Re: for x,y in word1, word2 ?
On Aug 11, 5:40 am, Mensanator <[EMAIL PROTECTED]> wrote:
> On Aug 10, 11:18 pm, ssecorp <[EMAIL PROTECTED]> wrote:
>
> > Is there a syntax for looping through 2 iterables at the same time?
>
> > for x in y:
> > for a in b:
>
> > is not what I want.
>
> > I want:
> > for x in y and for a in b:
>
> Something like this?
>
> >>> a = ['a','b','c']
> >>> b = [1,2,3]
> >>> zip(a,b)
>
> [('a', 1), ('b', 2), ('c', 3)]
I would have thought the difflib library and SequenceMatcher would do
(more than) what you're after.
Just an idea anyway,
Jon.
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Re: Wildcards for regexps?
ssecorp schrieb: If I have an expression like "bob marley" and I want to match everything with one letter wrong, how would I do? so "bob narely" and "vob marley" should match etc. Fuzzy matching is better done using Levensthein-distance [1] or n-gram-matching [2]. Diez [1] http://en.wikipedia.org/wiki/Levenshtein_distance [2] http://en.wikipedia.org/wiki/Ngram#n-grams_for_approximate_matching -- http://mail.python.org/mailman/listinfo/python-list
Re: for x,y in word1, word2 ?
On Aug 10, 11:14 pm, ssecorp <[EMAIL PROTECTED]> wrote:
> On Aug 11, 6:40 am, Mensanator <[EMAIL PROTECTED]> wrote:
>
>
>
> > On Aug 10, 11:18 pm, ssecorp <[EMAIL PROTECTED]> wrote:
>
> > > Is there a syntax for looping through 2 iterables at the same time?
>
> > > for x in y:
> > > for a in b:
>
> > > is not what I want.
>
> > > I want:
> > > for x in y and for a in b:
>
> > Something like this?
>
> > >>> a = ['a','b','c']
> > >>> b = [1,2,3]
> > >>> zip(a,b)
>
> > [('a', 1), ('b', 2), ('c', 3)]
>
> I know zip but lets say I have a word "painter" and I want to compare
> it to a customer's spelling, he might have written "paintor" and I
> want to check how many letters are the same.
>
> Now I know how I could do this, it is not hard.
> I am just wondering if these is any specific simple syntax for it.
There are two answers: first, if your domain interest is spell-
checking, search for "phonetic algorithm" or "soundex python". If your
interest is iteration, check out itertools - AFAIK this is the closest
you will get to a simple syntax for iterating over the diagonal as
opposed to the Cartesian product.
>>> from itertools import *
>>> for x,y in izip('painter','paintor'):
... print x == y
...
David
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Re: for x,y in word1, word2 ?
On Sun, 10 Aug 2008 23:14:50 -0700, ssecorp wrote:
> I know zip but lets say I have a word "painter" and I want to compare it
> to a customer's spelling, he might have written "paintor" and I want to
> check how many letters are the same.
>
> Now I know how I could do this, it is not hard. I am just wondering if
> these is any specific simple syntax for it.
No special syntax for that, but you can combine the `sum()` function, a
generator expression and `zip()`:
In [40]: sum(int(a == b) for a, b in zip('painter', 'paintor'))
Out[40]: 6
Or this way if you think it's more clear:
In [41]: sum(1 for a, b in zip('painter', 'paintor') if a == b)
Out[41]: 6
Ciao,
Marc 'BlackJack' Rintsch
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Re: adding python libraries (for shared hosting)
Joseph schrieb: Hi all, My shared host provides python 2.3. Since it is a shared hosting, he is not willing to upgrade to a newer version. He doesn't need to upgrade, he can install in parallel. I am looking for option to upload 2.5 on my own. Is this possible and if so, can anyone please provide a pointer to how this can be achieved? If you have a compiler available at the shared host & a shell-account, download Python and install, as told in the readmes. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: "shelve" save object
hypermonkey2 wrote:
> In any case, I shelve into a file "test.txt". I notice that when i try
> running the program on a different computer (by either emailing or
> transfering the file "test.txt" via USB key), the program is unable to
> load the shelve file.
You might find the 3rd party module 'shove' is more suitable for your
needs here.
http://pypi.python.org/pypi/shove
It provides a lot more backend support than shelve, of particular
interest to you would be filesystem (& maybe sqlite).
>>> from shove import Shove
>>> fsdb = Shove('file://persistent.db')
>>> fsdb['key1'] = 'value1'
>>> fsdb.close()
In this example, using the file protocol will produce a
'persistent.db' folder with the key/value pairs stored within it as
files. This should be cross platform enough for your needs.
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updating dictionaries from/to dictionaries
Hi all,
I am not altogether experienced in Python, but I haven't been able to
find a good example of the syntax that I'm looking for in any tutorial
that I've seen. Hope somebody can point me in the right direction.
This should be pretty simple: I have two dictionaries, foo and bar.
I am certain that all keys in bar belong to foo as well, but I also
know that not all keys in foo exist in bar. All the keys in both foo
and bar are tuples (in the bigram form ('word1', 'word2)). I have to
prime foo so that each key has a value of 1. The values for the keys
in bar are variable integers. All I want to do is run a loop through
foo, match any of its keys that also exist in bar, and add those key's
values in bar to the preexisting value of 1 for the corresponding key
in foo. So in the end the key,value pairs in foo won't necessarily
be, for example, 'tuple1: 1', but also 'tuple2: 31' if tuple2 had a
value of 30 in bar.
I *think* the get method might work, but I'm not sure that it can work
on two dictionaries the way that I'm getting at. I thought that
converting the dictionaries to lists might work, but I can't see a way
yet to match the tuple key as x[0][0] in one list for all y in the
other list. There's just got to be a better way!
Thanks for any help,
Brandon
(trying hard to be Pythonic but isn't there yet)
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Re: updating dictionaries from/to dictionaries
for k in foo:
foo[k] += bar.get(k, 0)
On Mon, Aug 11, 2008 at 3:27 AM, Brandon <[EMAIL PROTECTED]> wrote:
> Hi all,
>
> I am not altogether experienced in Python, but I haven't been able to
> find a good example of the syntax that I'm looking for in any tutorial
> that I've seen. Hope somebody can point me in the right direction.
>
> This should be pretty simple: I have two dictionaries, foo and bar.
> I am certain that all keys in bar belong to foo as well, but I also
> know that not all keys in foo exist in bar. All the keys in both foo
> and bar are tuples (in the bigram form ('word1', 'word2)). I have to
> prime foo so that each key has a value of 1. The values for the keys
> in bar are variable integers. All I want to do is run a loop through
> foo, match any of its keys that also exist in bar, and add those key's
> values in bar to the preexisting value of 1 for the corresponding key
> in foo. So in the end the key,value pairs in foo won't necessarily
> be, for example, 'tuple1: 1', but also 'tuple2: 31' if tuple2 had a
> value of 30 in bar.
>
> I *think* the get method might work, but I'm not sure that it can work
> on two dictionaries the way that I'm getting at. I thought that
> converting the dictionaries to lists might work, but I can't see a way
> yet to match the tuple key as x[0][0] in one list for all y in the
> other list. There's just got to be a better way!
>
> Thanks for any help,
> Brandon
> (trying hard to be Pythonic but isn't there yet)
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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Re: Second python program: classes, sorting
Others have replied to your original question. As an aside, just a few stylistic notes: class Score: def __init__(self, name_, score_): self.name = name_ self.score = score_ These trailing underscores look like a habit from another language. They are unneeded in Python; you can write: class Score: def __init__(self, name, score): self.name = name self.score = score That's an advantage of the explicit self: no ambiguity between local variables and attributes. try: infile = open(filename, "r") except IOError, (errno, strerror): print "IOError caught when attempting to open file %s. errno = %d, strerror = %s" % (filename, errno, strerror) exit(1) This try/except block is unneeded too: what you do with the exception is more or less the same as the regular behaviour (print an error message and exit), except your error message is far less informative than the default one, and printed to stdout instead of stderr. I would remove the entire try/except block and just write: infile = open(filename, "r") HTH -- python -c "print ''.join([chr(154 - ord(c)) for c in 'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])" -- http://mail.python.org/mailman/listinfo/python-list
Re: Eclipse, Python, wxPython and code completion
On 11 ago, 04:34, "SPE - Stani's Python Editor" <[EMAIL PROTECTED]> wrote: > On 10 aug, 20:42, [EMAIL PROTECTED] wrote: > > > > > Hello, > > > I've installed Eclipse, Python 2.5 and wxPython on Ubuntu 8.04. The > > problem is that I can't get code completion for wx module. I don't > > know if it occurs the same with other libraries outside the python > > "core". > > > If I compile/run my code containing the wx library, I get an > > application running correctly, so it looks that definition works fine. > > Obviously, the obstacle is that I don't know (I don't want to either) > > the name of every method of every wxPython class so it's difficult to > > develop anything within this environment. > > > Thanks a lot > > > Note: I'm a newbie-coming-from-"Billy's"-WindowsXP > > You can try SPE which is written in wxPython itself and has very good > code completion for wxPython. It also includes some wxPython GUI > builders such as wxGlade and XRCed. I improved it a lot for Hardy, > which I use myself: > sudo apt-get install spe > > Stani Thanks, Stani I will check this out -- http://mail.python.org/mailman/listinfo/python-list
Re: benchmark
On Aug 10, 10:10 pm, Kris Kennaway <[EMAIL PROTECTED]> wrote: > jlist wrote: > > I think what makes more sense is to compare the code one most > > typically writes. In my case, I always use range() and never use psyco. > > But I guess for most of my work with Python performance hasn't been > > a issue. I haven't got to write any large systems with Python yet, where > > performance starts to matter. > > Hopefully when you do you will improve your programming practices to not > make poor choices - there are few excuses for not using xrange ;) > > Kris And can you shed some light on how that relates with one of the zens of python ? There should be one-- and preferably only one --obvious way to do it. Dhananjay -- http://mail.python.org/mailman/listinfo/python-list
Re: updating dictionaries from/to dictionaries
On Aug 11, 6:24 pm, "Calvin Spealman" <[EMAIL PROTECTED]> wrote: > for k in foo: > foo[k] += bar.get(k, 0) An alternative: for k in bar: foo[k] += bar[k] The OP asserts that foo keys are a superset of bar keys. If that assertion is not true (i.e. there are keys in bar that are not in foo, your code will silently ignore them whereas mine will cause an exception to be raised (better behaviour IMHO). If the assertion is true, mine runs faster (even when len(foo) == len(bar). -- http://mail.python.org/mailman/listinfo/python-list
Re: benchmark
On Aug 11, 10:55 am, [EMAIL PROTECTED] wrote: > On Aug 10, 10:10 pm, Kris Kennaway <[EMAIL PROTECTED]> wrote: > > > jlist wrote: > > > I think what makes more sense is to compare the code one most > > > typically writes. In my case, I always use range() and never use psyco. > > > But I guess for most of my work with Python performance hasn't been > > > a issue. I haven't got to write any large systems with Python yet, where > > > performance starts to matter. > > > Hopefully when you do you will improve your programming practices to not > > make poor choices - there are few excuses for not using xrange ;) > > > Kris > > And can you shed some light on how that relates with one of the zens > of python ? > > There should be one-- and preferably only one --obvious way to do it. > > Dhananjay And that is xrange, but if you need a list range is better :P -- http://mail.python.org/mailman/listinfo/python-list
Printing a text file using Python
Serge:
in your code i believe that you did one read of your whole input file, and then
you emitted that to the dc with textout. textout's use is actually
(x,y,string).
hence one line got printed (actually the whole file got printed but
truncated)
you will have to detect all the end of lines and loop a whole lot of dc.textouts
Robin
your code:
dc = win32ui.CreateDC()
dc.CreatePrinterDC()
dc.SetMapMode(4)# This is UI_MM_LOENGLISH
# With this map mode, 12 points is 12*100/72 units = 16
font = win32ui.CreateFont({'name' : 'Arial', 'height' : 16})
dc.SelectObject(font)
f=open("./Reports/Report.txt","r")
memory=f.read()
f.close
memory.split('\n')
dc.StartDoc("./Reports/Report.txt")
dc.StartPage()
dc.TextOut(10,10,memory)
dc.EndPage()
dc.EndDoc()
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Digitally sign PDF files
Hi all I'm developing an application with some reports and we're looking for advice. This reports should be openoffice.org .odf files, pdf files, and perhaps microsoft word files (.doc, .docx?) and must be digitally signed. Is out there some kind of libraries to ease this tasks? * Access to the local user certificate store, and read PEM or PKCS12 certificate files. * Read, parse and validate user certificates * Sign documents: as a binary stream, within an specific document (pdf, odt, doc) I've been googling and found very few documentation about this -- except some examples using jython and ironpython. Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: ANN: P4D 1.2
Kay Schluehr wrote: P4D = E4X style embedded DSL for Python but without E and X. The main feature of P4D 1.2 are *Bytelets*. While the primary purpose of P4D 1.1 was the support textual data which can be considered as isomorphic to XML the new release is focussed on binary data. Bytelets are P4D objects that are assembled from hexcode which is reified as a Hex object. [...] I am not supposed to understand any of this, right? -- Gerhard -- http://mail.python.org/mailman/listinfo/python-list
Re: benchmark
[EMAIL PROTECTED] wrote: > On Aug 10, 10:10 pm, Kris Kennaway <[EMAIL PROTECTED]> wrote: >> jlist wrote: >> > I think what makes more sense is to compare the code one most >> > typically writes. In my case, I always use range() and never use psyco. >> > But I guess for most of my work with Python performance hasn't been >> > a issue. I haven't got to write any large systems with Python yet, >> > where performance starts to matter. >> >> Hopefully when you do you will improve your programming practices to not >> make poor choices - there are few excuses for not using xrange ;) >> >> Kris > > And can you shed some light on how that relates with one of the zens > of python ? > > There should be one-- and preferably only one --obvious way to do it. For the record, the impact of range() versus xrange() is negligable -- on my machine the xrange() variant even runs a tad slower. So it's not clear whether Kris actually knows what he's doing. For the cases where xrange() is an improvement over range() "Practicality beats purity" applies. But you should really care more about the spirit than the letter of the "zen". Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: benchmark
On Aug 11, 2:09 pm, [EMAIL PROTECTED] wrote: > On Aug 11, 10:55 am, [EMAIL PROTECTED] wrote: > > > > > On Aug 10, 10:10 pm, Kris Kennaway <[EMAIL PROTECTED]> wrote: > > > > jlist wrote: > > > > I think what makes more sense is to compare the code one most > > > > typically writes. In my case, I always use range() and never use psyco. > > > > But I guess for most of my work with Python performance hasn't been > > > > a issue. I haven't got to write any large systems with Python yet, where > > > > performance starts to matter. > > > > Hopefully when you do you will improve your programming practices to not > > > make poor choices - there are few excuses for not using xrange ;) > > > > Kris > > > And can you shed some light on how that relates with one of the zens > > of python ? > > > There should be one-- and preferably only one --obvious way to do it. > > > Dhananjay > > And that is xrange, but if you need a list range is better :P Interesting to read from PEP-3000 : "Python 2.6 will support forward compatibility in the following two ways: * It will support a "Py3k warnings mode" which will warn dynamically (i.e. at runtime) about features that will stop working in Python 3.0, e.g. assuming that range() returns a list." -- http://mail.python.org/mailman/listinfo/python-list
How to execute commands in internal zones of solaris using python running from the global zone ?
How to execute commands in internal zones of solaris using python
running from the global zone ?
i tried --
1> os.popen("zlogin ")
2> os.popen("zonename")
the 2nd command executes back into the global zone and not into the
internal zone
can anyone help?
Hishaam
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DATICS'09 - Call For Papers
Apologies for any multiple copies received. We would appreciate it if you could distribute the following call for papers to any relevant mailing lists you know of. -- DATICS: Design, Analysis and Tools for Integrated Circuits and Systems event was created by a network of researchers and engineers both from academia and industry. The first edition took place in Crete Island, Greece, July 22-24, 2008 ( http://digilander.libero.it/systemcfl/datics). Main target of DATICS'09 is to bring together software/hardware engineering researchers, computer scientists, practitioners and people from industry to exchange theories, ideas, techniques and experiences related to all areas of design, analysis and tools for integrated circuits (e.g. digital, analog and mixed-signal circuits) and systems (e.g. real-time, hybrid and embedded systems). DATICS'09 also focuses on the field of formal methods, wireless sensor networks (WSNs) and low power design methodologies for integrated circuits and systems. Topics of interest include, but are not limited to, the following: * digital, analog, mixed-signal designs and test * RF design and test * design-for-testability and built-in self test methodologies * reconfigurable system design * high-level synthesis * EDA tools for design, testing and verification * low power design methodologies * network and system on-a-chip * application-specific SoCs * wireless sensor networks (WSNs) * specification languages: SystemC, SystemVerilog and UML * all areas of modelling, simulation and verification * formal methods and formalisms (e.g. process algebras, petri-nets, automaton theory and BDDs) * real-time, hybrid and embedded systems * software engineering (including real-time Java, real-time UML and performance metrics) DATICS'09 has been organised into two special sessions: * DATICS-IMECS'09 (http://digilander.libero.it/systemcfl/datics09-imecs) will be hosted by the International MultiConference of Engineers and Computer Scientists 2009 (IMECS'09) which will take place in Hong Kong, 18-20 March, 2009. * DATICS-ICIEA'09 (http://digilander.libero.it/systemcfl/datics09-iciea) will be hosted by the 4th IEEE Conference on Industrial Electronics and Applications (ICIEA'09) which will take place in Xi'an, China, 25-27 May, 2009. Please visit the DATICS-IMECS'09 and DATICS-ICIEA'09 websites for paper submission guidelines, proceedings, publication indexing, submission deadlines, International Program Committee and sponsors. For any additional information, please contact Dr. K.L. Man University College Cork (UCC), Ireland Email: [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
paretovariate
I want to realize a list of numbers. They follow pareto distribution. For instance, the average value is 10 and alpha is 1.0 I do not know how to use the function of paretovariate(alpha). It only provides alpha parameter. How should I set the average value? -- http://mail.python.org/mailman/listinfo/python-list
Re: SSH utility
James Brady was kind enough to say: > Hi all, > I'm looking for a python library that lets me execute shell commands > on remote machines. > > I've tried a few SSH utilities so far: paramiko, PySSH and pssh; > unfortunately all been unreliable, and repeated questions on their > respective mailing lists haven't been answered... Twisted conch seems to be your last chance :-) -- Alan Franzoni <[EMAIL PROTECTED]> - Remove .xyz from my email in order to contact me. - GPG Key Fingerprint: 5C77 9DC3 BD5B 3A28 E7BC 921A 0255 42AA FE06 8F3E -- http://mail.python.org/mailman/listinfo/python-list
Re: benchmark
Peter Otten wrote: [EMAIL PROTECTED] wrote: On Aug 10, 10:10 pm, Kris Kennaway <[EMAIL PROTECTED]> wrote: jlist wrote: I think what makes more sense is to compare the code one most typically writes. In my case, I always use range() and never use psyco. But I guess for most of my work with Python performance hasn't been a issue. I haven't got to write any large systems with Python yet, where performance starts to matter. Hopefully when you do you will improve your programming practices to not make poor choices - there are few excuses for not using xrange ;) Kris And can you shed some light on how that relates with one of the zens of python ? There should be one-- and preferably only one --obvious way to do it. For the record, the impact of range() versus xrange() is negligable -- on my machine the xrange() variant even runs a tad slower. So it's not clear whether Kris actually knows what he's doing. You are only thinking in terms of execution speed. Now think about memory use. Using iterators instead of constructing lists is something that needs to permeate your thinking about python or you will forever be writing code that wastes memory, sometimes to a large extent. Kris -- http://mail.python.org/mailman/listinfo/python-list
Re: SSH utility
James Brady wrote: Hi all, I'm looking for a python library that lets me execute shell commands on remote machines. I've tried a few SSH utilities so far: paramiko, PySSH and pssh; unfortunately all been unreliable, and repeated questions on their respective mailing lists haven't been answered... It seems like the sort of commodity task that there should be a pretty robust library for. Are there any suggestions for alternative libraries or approaches? Personally I just Popen ssh directly. Things like paramiko make me concerned; getting the SSH protocol right is tricky and not something I want to trust to projects that have not had significant experience and auditing. Kris -- http://mail.python.org/mailman/listinfo/python-list
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Re: paretovariate
On Aug 11, 3:14 am, "zhjchen" <[EMAIL PROTECTED]> wrote: > I want to realize a list of numbers. They follow pareto distribution. > For instance, the average value is 10 and alpha is 1.0 > I do not know how to use the function of paretovariate(alpha). It only > provides > alpha parameter. How should I set the average value? I'm guessing that paretovalue(alpha) treats alpha as the shape parameter and assumes a mode of 1.0, in which case you would multiply by 10 for your example. Alternatively, you could define your own Pareto function: # pareto for mode, shape > 0.0 def pareto(mode, shape): return mode * pow(1.0 - random.random(), -1.0 / shape) -- http://mail.python.org/mailman/listinfo/python-list
Re: SSH utility
for similar tasks, I use pexpect http://pypi.python.org/pypi/pexpect.
spawning bash process and simulate an interactive session. Here sending ls
command, retrieving results and exiting. In the spawned process ssh or any
other command, is just another command.
actual session--
$ python
Python 2.5.1 (r251:54863, May 18 2007, 16:56:43)
[GCC 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import pexpect
>>> c = pexpect.spawn('/bin/bash')
>>> c.expect([pexpect.TIMEOUT, pexpect.EOF, '\$ '])
2
>>> c.before, c.after
('[EMAIL PROTECTED]:~\r\n', '$ ')
>>> c.sendline('ls')
3
>>> c.expect([pexpect.TIMEOUT, pexpect.EOF, '\$ '])
2
>>> c.before, c.after
('ls\r\x.txt xx.txt xy.txt [EMAIL PROTECTED]:~\r\n', '$ ')
>>> c.sendline('exit')
5
>>> c.expect([pexpect.TIMEOUT, pexpect.EOF, '\$ '])
1
>>> c.before, c.after
('exit\r\nexit\r\n', )
>>> exit()
[EMAIL PROTECTED]:~
$
---
hope that helps.
regards.
Edwin
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
On Behalf Of James Brady
Sent: Monday, August 11, 2008 12:26 AM
To: python-list@python.org
Subject: SSH utility
Hi all,
I'm looking for a python library that lets me execute shell commands
on remote machines.
I've tried a few SSH utilities so far: paramiko, PySSH and pssh;
unfortunately all been unreliable, and repeated questions on their
respective mailing lists haven't been answered...
It seems like the sort of commodity task that there should be a pretty
robust library for. Are there any suggestions for alternative
libraries or approaches?
Thanks!
James
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Re: SSH utility
On Sun, 10 Aug 2008 21:25:38 -0700 (PDT), James Brady <[EMAIL PROTECTED]> wrote: Hi all, I'm looking for a python library that lets me execute shell commands on remote machines. I've tried a few SSH utilities so far: paramiko, PySSH and pssh; unfortunately all been unreliable, and repeated questions on their respective mailing lists haven't been answered... It seems like the sort of commodity task that there should be a pretty robust library for. Are there any suggestions for alternative libraries or approaches? You can find an example of running commands over SSH with Twisted online: http://twistedmatrix.com/projects/conch/documentation/examples/ Jean-Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: for x,y in word1, word2 ?
sounds like *soundex* is what you are looking for. google soundex
regards
Edwin
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
On Behalf Of Marc 'BlackJack' Rintsch
Sent: Monday, August 11, 2008 3:09 AM
To: python-list@python.org
Subject: Re: for x,y in word1, word2 ?
On Sun, 10 Aug 2008 23:14:50 -0700, ssecorp wrote:
> I know zip but lets say I have a word "painter" and I want to compare it
> to a customer's spelling, he might have written "paintor" and I want to
> check how many letters are the same.
>
> Now I know how I could do this, it is not hard. I am just wondering if
> these is any specific simple syntax for it.
No special syntax for that, but you can combine the `sum()` function, a
generator expression and `zip()`:
In [40]: sum(int(a == b) for a, b in zip('painter', 'paintor'))
Out[40]: 6
Or this way if you think it's more clear:
In [41]: sum(1 for a, b in zip('painter', 'paintor') if a == b)
Out[41]: 6
Ciao,
Marc 'BlackJack' Rintsch
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Beta testing website
Hi All, This is a bit off-topic but may be of interest to some people. I have just found a website that looks interesting. It lets companies register their products for beta testing, and testers specify what sort of products that they would like to test. Sort of a beta testing dating service - Membership is free. It look like it is just starting out, but is a promising concept. Betatestnow.com Cheers Mike -- http://mail.python.org/mailman/listinfo/python-list
Suggestion for converting PDF files to HTML/txt files
Could someone suggest me ways to convert PDF files to HTML files?? Does Python have any modules to do that job?? Thanks, Srini Unlimited freedom, unlimited storage. Get it now, on http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html/ -- http://mail.python.org/mailman/listinfo/python-list
Re: SSH utility
I use pexpect. On Mon, Aug 11, 2008 at 7:22 AM, Jean-Paul Calderone <[EMAIL PROTECTED]>wrote: > On Sun, 10 Aug 2008 21:25:38 -0700 (PDT), James Brady < > [EMAIL PROTECTED]> wrote: > >> Hi all, >> I'm looking for a python library that lets me execute shell commands >> on remote machines. >> >> I've tried a few SSH utilities so far: paramiko, PySSH and pssh; >> unfortunately all been unreliable, and repeated questions on their >> respective mailing lists haven't been answered... >> >> It seems like the sort of commodity task that there should be a pretty >> robust library for. Are there any suggestions for alternative >> libraries or approaches? >> > > You can find an example of running commands over SSH with Twisted online: > > http://twistedmatrix.com/projects/conch/documentation/examples/ > > Jean-Paul > > -- > http://mail.python.org/mailman/listinfo/python-list > -- | _ | * | _ | | _ | _ | * | | * | * | * | -- http://mail.python.org/mailman/listinfo/python-list
if len(str(a)) == len(str(r)) and isMult(a, r): faster if isMult is slow?
If isMult is slow then: if len(str(a)) == len(str(r)) and isMult(a, r): trues.append((a, r)) will be much faster than: if isMult(a, r) and len(str(a)) == len(str(r)): trues.append((a, r)) right? seems obvious but there is no magic going on that wouldn't make this true right? -- http://mail.python.org/mailman/listinfo/python-list
Re: if len(str(a)) == len(str(r)) and isMult(a, r): faster if isMult is slow?
On Aug 11, 3:03 pm, maestro <[EMAIL PROTECTED]> wrote: > If isMult is slow then: > > if len(str(a)) == len(str(r)) and isMult(a, r): > trues.append((a, r)) > > will be much faster than: > > if isMult(a, r) and len(str(a)) == len(str(r)): > trues.append((a, r)) > > right? seems obvious but there is no magic going on that wouldn't > make this true right? Once a failed condition is met the rest are skipped for evaluation. Whether or not that saves you any reasonable amount of time would be up to the various tests being used with your conditions. If your function isMult is just doing the same work as "if not a % r" then that would be faster than casting your integers/floats to a string and testing their length imo. You could always go through the trouble of profiling your code with separate if statements to see how much time is spent on each, also note your mean failure rate for each conditional test and then decide for yourself which to place first. Hope that helps, Chris -- http://mail.python.org/mailman/listinfo/python-list
Re: Video information
"Bill McClain" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> On 2008-08-09, dusans <[EMAIL PROTECTED]> wrote:
>> Is there a py module, which would get me information of a movie file:
>> - resolution
>> - fps
>
> I don't know of one. I use the transcode utilities for this and parse
> their
> output.
>
Something like:
from subprocess import Popen, PIPE
probe = Popen(("tcprobe", "-i", ip_file), stdout=PIPE,
stderr=PIPE).communicate()[0]
or
from subprocess import Popen, PIPE
probe = Popen(("mplayer", "-identify", "-frames", "0", "-ao", "null",
ip_file), stdout=PIPE, stderr=PIPE).communicate()[0]
First one uses transcode the second one uses mplayer. I normally follow
these with a regexp search on "probe" for the data I want.
I have found mplayer to be more accurate than transcode which seems to have
a problem with some files notably MPEG program streams although it seems to
work fine for elementary streams.
--
Geoff
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dynamically creating html code with python...
Hi,
how can I combine some dynamically generated html code (using python) with the
output of a urllib.openurl() call?
I have tried to use the StringIO() class with .write functions, but it did not
work. Below is the code that does not work.
[CODE]
f=StringIO.StringIO()
f.write('data analysis')
f.write(urllib.urlopen("http://localhost/path2Libs/myLibs.py";,
urllib.urlencode(TheData)))
f.write("")
print "Content-type: text/html\n"
print f.read()
f.close()
[/CODE]
What is wrong with this approach/code? Is there an easier way of doing it?
Thanks.
--
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Re: dynamically creating html code with python...
[EMAIL PROTECTED] wrote: Hi, how can I combine some dynamically generated html code (using python) with the output of a urllib.openurl() call? I have tried to use the StringIO() class with .write functions, but it did not work. Below is the code that does not work. Help us help you. "Does not work" is not a helpful description. Do you get an error message? If so, what is the error message? Do you get an unexpected result? If so, what is the unexpected result, and what is the result you expected? Is there an easier way of doing it? Probably. You seem to be invoking a python program that's local to your computer, so it's not quite clear why you're going the roundabout way of serving it up through a web server. Then again, you're not telling us the actual problem you're trying to solve, so we have no idea what the best solution to that problem might be. -- Carsten Haese http://informixdb.sourceforge.net -- http://mail.python.org/mailman/listinfo/python-list
Re: dynamically creating html code with python...
On Mon, Aug 11, 2008 at 9:15 AM, <[EMAIL PROTECTED]> wrote:
> [CODE]
> f=StringIO.StringIO()
> f.write('data analysis')
> f.write(urllib.urlopen("http://localhost/path2Libs/myLibs.py";,
> urllib.urlencode(TheData)))
> f.write("")
>
> print "Content-type: text/html\n"
> print f.read()
> f.close()
> [/CODE]
>
> What is wrong with this approach/code? Is there an easier way of doing it?
A StringIO object works a lot like a file. When you write to it, it
keeps track of the current position in the file. When you read from
it, it reads from the current position to the end of the file. Once
you're done writing to the StringIO object, you can rewind the
position to the beggining and then read to the end, like this:
f = StringIO.StringIO()
f.write('This is some data')
f.seek(0)
print f.read()
StringIO objects also have a special getvalue() method, which allows
you to get the entire contents without changing the current position.
You can replace your f.read() with f.getvalue() without having to mess
with seek(), but then your code won't work with real files, if that's
important.
--
Jerry
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Re: Suggestion for converting PDF files to HTML/txt files
srinivasan srinivas wrote: Could someone suggest me ways to convert PDF files to HTML files?? Does Python have any modules to do that job?? Thanks, Srini Unless there is some recent development, the answer is no, it's not possible. Getting text out of PDF is difficult (to say the least) and at times impossible... i.e. a PDF can be an image that contains some text, etc. -- http://mail.python.org/mailman/listinfo/python-list
RE: internet searching program
Google does'nt allow use of their API's anymore, I belive Yahoo has one or
you could do something like below.
searchstring = 'stuff here'
x = os.popen('lynx -dump http://www.google.com/search?q=%s' %
searchstring).readlines()
-Original Message-
From: Steven D'Aprano [mailto:[EMAIL PROTECTED]
Sent: Friday, August 08, 2008 11:22 PM
To: python-list@python.org
Subject: Re: internet searching program
On Fri, 08 Aug 2008 19:59:02 -0700, KillSwitch wrote:
> Is it possible to make a program to search a site on the internet, then
> get certain information from the web pages that match and display them?
> Like, you would put in keywords to be searched for on youtube.com, then
> it would search youtube.com, get the names of the videos, the links, and
> the embed information? Or something like that.
Search the Internet? Hmmm... I'm not sure, but I think Google does
something quite like that, but I don't know if they do it with a computer
program or an army of trained monkeys.
--
Steven
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Unable to read data from transport connection
Hello group, i am running a web server on cherrypy 2.2.0 using python2.5 and turbogears1.0. I have a client application in C#.NET which uploads the data on to web server over HTTP. Very frequently i encounter error logs on my client application which says -- "Unable to read data from transport connection. The connection was forcibly closed by the remote host." since the data that is being sent from C# app is being encrypted using standard AES implementaion in C#. thus to decrypt the same on server side i am forking a C# executable with decryption code using -- "os.spawnv(os.P_WAIT,exePath, )". I would like to know is this a client side problem(C#) or a server side problem(Cherrypy, Python). if someone needs any piece of code to help me please cantact me@ [EMAIL PROTECTED] Thanks Group. -- http://mail.python.org/mailman/listinfo/python-list
Re: Second python program: classes, sorting
WP a écrit : Hello, here are some new things I've problems with. I've made a program that opens and reads a text file. Each line in the file contains a name and a score. I'm assuming the file has the correct format. Each name-score pair is used to instantiate a class Score I've written. This works fine, but here's my problem: After reading the file I have list of Score objects. Now I want to sort them in descending order. But no matter how I write my __cmp__ the order remains unchanged. You fixed this, so I'll just comment on the rest of the code... (snip) Complete program: class Score: Unless you have a compelling reason (mostly: compat with ages old Python versions), better to use new-style classes: class Score(object): def __init__(self, name_, score_): self.name = name_ self.score = score_ cf Eric Brunel's comments here about the trailing underscores. def __str__(self): return "Name = %s, score = %d" % (self.name, self.score) (snip) name = "" score = 0 Do you have any reason to have these as class attributes too ? # End class Score filename = "../foo.txt"; try: infile = open(filename, "r") except IOError, (errno, strerror): print "IOError caught when attempting to open file %s. errno = %d, strerror = %s" % (filename, errno, strerror) exit(1) cf Eric Brunel's comment wrt/ why this try/except clause is worse than useless here. lines = infile.readlines() File objects are their own iterators. You don't need to read the whole file in memory. infile.close() lines = [l.strip() for l in lines] # Strip away trailing newlines. scores = [] for a_line in lines: splitstuff = a_line.split() scores.append(Score(splitstuff[0], int(splitstuff[1]))) scores = [] mk_score = lambda name, score : Score(name, int(score)) infile = open(filename) for line in infile: line = line.strip() if not line: continue scores.append(mk_score(*line.split())) infile.close() As a side note : I understand that this is a learning exercice, but in real life, if that's all there is to your Score class, it's not really useful - I'd personnally use a much simpler representation, like a list of score / name pairs (which is easy to sort, reverse, update, turn into a name=>scores or scores=>names dict, etc). My 2 cents. -- http://mail.python.org/mailman/listinfo/python-list
at_most: search "dictionary" for less than or equal
Before I set out to reinvent the wheel. I want a dictionary-like structure for which most lookups will be on a key that is not in the "dictionary"; in which case I want a key/value returned which is the closest key that is less than the search term. The batch solution of matching the values in two sorted sequences is efficient but a random lookup would be more convenient. A solution based on AVL trees seems possible. -- djc -- http://mail.python.org/mailman/listinfo/python-list
Re: at_most: search "dictionary" for less than or equal
slais-www, a BK-tree maybe isn't right what you need but it may be enough: http://code.activestate.com/recipes/572156/ Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: How to execute commands in internal zones of solaris using python running from the global zone ?
You might try subprocess, first of all. Use it to launch zlogin and
then treat it like a shell and write 'zonename\n' to its stdin, to
simulate running it as a user. This is a good bet, but I don't have
either available to try it. The subprocess documentation covers
invoking a process and writing to its input.
What you are doing now doesn't work, because you just invoke the two
processes and dont do anything with either of them. zlogin may not
have even completely initialized when you start the second command.
The technique you need is to start zlogin and then tell it to run the
next.
On Mon, Aug 11, 2008 at 6:39 AM, Hishaam <[EMAIL PROTECTED]> wrote:
> How to execute commands in internal zones of solaris using python
> running from the global zone ?
>
> i tried --
> 1> os.popen("zlogin ")
> 2> os.popen("zonename")
>
> the 2nd command executes back into the global zone and not into the
> internal zone
> can anyone help?
>
>
> Hishaam
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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Re: at_most: search "dictionary" for less than or equal
On Aug 11, 9:18 am, slais-www <[EMAIL PROTECTED]> wrote: > Before I set out to reinvent the wheel. > > I want a dictionary-like structure for which most lookups will be on a > key that is not in the "dictionary"; in which case I want a key/value > returned which is the closest key that is less than the search term. > > The batch solution of matching the values in two sorted sequences is > efficient but a random lookup would be more convenient. A solution based > on AVL trees seems possible. > > -- > djc Sounds like you have very long lists to work with. Maybe a solution using bisect would combine simplest structure with best performance. -- Paul -- http://mail.python.org/mailman/listinfo/python-list
eval or execute, is this the (most) correct way ?
hello, I'm trying to make an editor with an integrated Shell. >>So when type: 2+5 >>I want the answer on the next line: 7 >>When I type: myvar = 55 myvar >>I want the value of myvar: 55 So AFAIK, sometimes I've to use eval and sometimes I need exec, so I use the following code (global / local dictionary parameters are left out in this example): try: print eval ( line ) except : exec ( line ) Is this the (most) correct / elegant way, or are there better solutions ? I read somewhere that exec is going to disappear, and noticed that in 2.5 (I just updated to) the doc is already disapeared, is this no longer possible in Python 3 ? thanks, Stef Mientki -- http://mail.python.org/mailman/listinfo/python-list
Re: dynamically creating html code with python...
Sorry, my fault...
I am trying to build a web application for data analysis. Basically some data
will be read from a database and passed to a python script (myLibs.py) to build
an image as follows.
[CODE]
f=urllib.urlopen("http://localhost/path2Libs/myLibs.py",urllib.urlencode(TheData))
print "Content-type: image/png\n"
print f.read()
f.close()
[/CODE]
This section behaves as expected, and I can see the chart on the web-page.
Now, I would like to add some text and possibly more charts (generated in the
same way) to my web-page. This is what I need help with.
I tried to add some html code to the f variable (file-type variable) before and
after the plot generated (see first post). When I load the page in a browser, I
get a blank page, not even the chart (that I used to get) appears any more.
There is no error messages in the server's error log, and when I run it as a
python script I get the following output:
Content-type: image/png\n
My question:
How can I use python to dynamically add descriptive comments (text), and
possibly more charts to the web-page?
Hope this is more explanatory.
Thanks
[EMAIL PROTECTED] wrote :
> Hi,
>
> how can I combine some dynamically generated html code (using python) with
> the output of a urllib.openurl() call?
>
> I have tried to use the StringIO() class with .write functions, but it did
> not work. Below is the code that does not work.
>
> [CODE]
> f=StringIO.StringIO()
> f.write('data analysis')
> f.write(urllib.urlopen("http://localhost/path2Libs/myLibs.py";,
> urllib.urlencode(TheData)))
> f.write("")
>
> print "Content-type: text/html\n"
> print f.read()
> f.close()
> [/CODE]
>
> What is wrong with this approach/code? Is there an easier way of doing it?
>
> Thanks.
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
--
http://mail.python.org/mailman/listinfo/python-list
Re: Python for Blackberry mobile phones
On Sun, Aug 10, 2008 at 9:54 PM, <[EMAIL PROTECTED]> wrote: > I'm looking for a version of Python for Blackberry mobile phones - has > anyone heard of such a thing? I've been googling this topic without success. > > Thanks, > Malcolm My understanding is that the BB's run Java, so there *may* be some chance that it might be possible to get Jython running on it. -- Stand Fast, tjg. [Timothy Grant] -- http://mail.python.org/mailman/listinfo/python-list
Re: Wildcards for regexps?
On Sun, Aug 10, 2008 at 9:10 PM, ssecorp <[EMAIL PROTECTED]> wrote: > If I have an expression like "bob marley" and I want to match > everything with one letter wrong, how would I do? > so "bob narely" and "vob marley" should match etc. At one point I needed something like this so did a straight port of the double-metaphone code to python. It's horrible, it's ugly, it's non-pythonic in ways that make me cringe, it has no unit tests, but it does work. -- Stand Fast, tjg. [Timothy Grant] -- http://mail.python.org/mailman/listinfo/python-list
Re: for x,y in word1, word2 ?
My first thought is that you should be looking at implementations of Hamming Distance. If you are actually looking for something like SOUNDEX you might also want to look at the double metaphor algorithm, which is significantly harder to implement but provides better matching and is less susceptible to differences based on name origins. -- http://mail.python.org/mailman/listinfo/python-list
Re: Eclipse, Python, wxPython and code completion
if you need a good python ide with great code completition, then why don't you try WingIde. On 11 kol, 10:49, [EMAIL PROTECTED] wrote: > On 11 ago, 04:34, "SPE - Stani's Python Editor" > > > > > > <[EMAIL PROTECTED]> wrote: > > On 10 aug, 20:42, [EMAIL PROTECTED] wrote: > > > > Hello, > > > > I've installed Eclipse, Python 2.5 and wxPython on Ubuntu 8.04. The > > > problem is that I can't get code completion for wx module. I don't > > > know if it occurs the same with other libraries outside the python > > > "core". > > > > If I compile/run my code containing the wx library, I get an > > > application running correctly, so it looks that definition works fine. > > > Obviously, the obstacle is that I don't know (I don't want to either) > > > the name of every method of every wxPython class so it's difficult to > > > develop anything within this environment. > > > > Thanks a lot > > > > Note: I'm a newbie-coming-from-"Billy's"-WindowsXP > > > You can try SPE which is written in wxPython itself and has very good > > code completion for wxPython. It also includes some wxPython GUI > > builders such as wxGlade and XRCed. I improved it a lot for Hardy, > > which I use myself: > > sudo apt-get install spe > > > Stani > > Thanks, Stani > > I will check this out -- http://mail.python.org/mailman/listinfo/python-list
Problems returning data from embedded Python
Okay I'm having a few issues with this and I can't seem to get it
sorted out (most likely due to my inexperience with Python).
Here is my Python code:
def fileInput():
data = []
s = raw_input("Please enter the filename to process (enter full path
if not in current directory): ")
fd = open(s, "r")
fd.readline()
line = fd.readlines()
for record in line:
record = record.strip()
items = record.split(',')
for i in range(1, 5):
items[i] = float(items[i])
items[5] = int(items[5])
data.append(items)
fd.close()
return items
It works perfectly and does exactly what I want it to do. The problem
comes when I try and convert the data I returned from the Python script
and turn it into something useable in C.
I have no idea. The C functions that seem most use deal with Tuples,
when this is a list and I can't see any specific functions for dealing
with lists in the C API. Can anyone give me some pointers in the right
direction at all please? I know the C program has received the data
correctly, I just need to put it in C types.
Thank you.
--
"I disapprove of what you say, but I'll defend to the death your right
to say it." - Voltaire
--
http://mail.python.org/mailman/listinfo/python-list
Re: Psycho question
In article <[EMAIL PROTECTED]>, [EMAIL PROTECTED] wrote: > John Krukoff: > > One possibility for the performance difference, is that as I understand > > it the psyco developer has moved on to working on pypy, and probably > > isn't interested in keeping psyco updated and optimized for new python > > syntax. > > Somebody correct me if I'm wrong, but last I heard there's no > > expectation of a python 3.0 compatible version of psyco, either. > > But for me on the short term Python 3 is probably more important than > pypy, and I'd like to keep using Psyco... I feel the same way. Maybe someone will do it... (I wonder how much work it would be to make something like Psyco that only accepts a small subset of the language.) > Bye, > bearophile -- David C. Ullrich -- http://mail.python.org/mailman/listinfo/python-list
Re: dynamically creating html code with python...
I have tried calling a script containing the code below from a web browser and
it did not get the text.
[CODE]
#!c:/Python25/python.exe -u
import StringIO
f=StringIO.StringIO()
f.write('data analysis site')
f.write("This is a trial test")
f.write("")
print "Content-type: text/html\n"
print f.read()
f.close()
[/CODE]
So, I assume this is not the way to create web pages any links that can
help me take the right way?
Thanks!
Jerry Hill <[EMAIL PROTECTED]> wrote :
> On Mon, Aug 11, 2008 at 9:15 AM, <[EMAIL PROTECTED]> wrote:
> > [CODE]
> > f=StringIO.StringIO()
> > f.write('data analysis')
> > f.write(urllib.urlopen("http://localhost/path2Libs/myLibs.py";,
> > urllib.urlencode(TheData)))
> > f.write("")
> >
> > print "Content-type: text/html\n"
> > print f.read()
> > f.close()
> > [/CODE]
> >
> > What is wrong with this approach/code? Is there an easier way of doing it?
>
> A StringIO object works a lot like a file. When you write to it, it
> keeps track of the current position in the file. When you read from
> it, it reads from the current position to the end of the file. Once
> you're done writing to the StringIO object, you can rewind the
> position to the beggining and then read to the end, like this:
>
> f = StringIO.StringIO()
> f.write('This is some data')
> f.seek(0)
> print f.read()
>
> StringIO objects also have a special getvalue() method, which allows
> you to get the entire contents without changing the current position.
> You can replace your f.read() with f.getvalue() without having to mess
> with seek(), but then your code won't work with real files, if that's
> important.
>
> --
> Jerry
> --
> http://mail.python.org/mailman/listinfo/python-list
--
http://mail.python.org/mailman/listinfo/python-list
Re: eval or execute, is this the (most) correct way ?
On Mon, 11 Aug 2008 17:26:56 +0200, Stef Mientki wrote: > I'm trying to make an editor with an integrated Shell. ... > Is this the (most) correct / elegant way, or are there better solutions > ? The best solution is not to re-invent the wheel: "import code" is the way to emulate Python's interactive interpreter. Try running "python -m code" at a regular shell (not the Python shell, your operating system's shell). Doing a search of the file code.py, I don't find the string "eval" at all. My guess is that your approach is probably not the best way. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: New python module to simulate arbitrary fixed and infinite precision binary floating point
On Sun, 10 Aug 2008 16:34:34 -0400, Rob Clewley wrote: > Dear Pythonistas, > > How many times have we seen posts recently along the lines of "why is it > that 0.1 appears as 0.10001 in python?" that lead to posters > being sent to the definition of the IEEE 754 standard and the decimal.py > module? I am teaching an introductory numerical analysis class this > fall, and I realized that the best way to teach this stuff is to be able > to play with the representations directly ... > Consequently, I have written a module to simulate the machine > representation of binary floating point numbers and their arithmetic. > Values can be of arbitrary fixed precision or infinite precision, along > the same lines as python's in-built decimal class. The code is here: > http://www2.gsu.edu/~matrhc/binary.html I would be interested to look at that, if I can find the time. Is this related to minifloats? http://en.wikipedia.org/wiki/Minifloat -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: ANN: P4D 1.2
On 11 Aug., 11:41, Gerhard Häring <[EMAIL PROTECTED]> wrote: > Kay Schluehr wrote: > > P4D = E4X style embedded DSL for Python but without E and X. > > The main feature of P4D 1.2 are *Bytelets*. While the primary purpose > > of P4D 1.1 was the support textual data which can be considered as > > isomorphic to XML the new release is focussed on binary data. Bytelets > > are P4D objects that are assembled from hexcode which is reified as a > > Hex object. [...] > > I am not supposed to understand any of this, right? > > -- Gerhard Then forget this "Abstract" if it just produces noise and take a look at the examples and testcases. I'll release P4D 1.3 soon and will update the introduction written in the PyPI which might be helpful to get a first impression. -- http://mail.python.org/mailman/listinfo/python-list
Re: dynamically creating html code with python...
On Mon, Aug 11, 2008 at 12:26 PM, <[EMAIL PROTECTED]> wrote: > I have tried calling a script containing the code below from a web browser > and it did not get the text. You quoted my post that answered this question, but did not implement either of the two solutions I suggested. I continue to suggest that you either: f.seek(0) before you f.read(), or that you replace f.read() with f.getvalue(). Also, you may want to read the docs on StringIO - http://docs.python.org/lib/module-StringIO.html File objects - http://docs.python.org/lib/bltin-file-objects.html -- Jerry -- http://mail.python.org/mailman/listinfo/python-list
pympi and threading in python
Hello there I am confused in the usage/differences of pympi and threading in python. What I want to do it to run multiple MCMC simulations by dividing the number of the chains I want to run on number of the processors available. Some methods need to be synchronized/locked until some addition operation is finished. I will be very grateful if some one could help. Thanks very much Dina -- http://mail.python.org/mailman/listinfo/python-list
Re: benchmark
Kris Kennaway wrote: > Peter Otten wrote: >> [EMAIL PROTECTED] wrote: >> >>> On Aug 10, 10:10 pm, Kris Kennaway <[EMAIL PROTECTED]> wrote: jlist wrote: > I think what makes more sense is to compare the code one most > typically writes. In my case, I always use range() and never use > psyco. But I guess for most of my work with Python performance hasn't > been a issue. I haven't got to write any large systems with Python > yet, where performance starts to matter. Hopefully when you do you will improve your programming practices to not make poor choices - there are few excuses for not using xrange ;) Kris >>> And can you shed some light on how that relates with one of the zens >>> of python ? >>> >>> There should be one-- and preferably only one --obvious way to do it. >> >> For the record, the impact of range() versus xrange() is negligable -- on >> my machine the xrange() variant even runs a tad slower. So it's not clear >> whether Kris actually knows what he's doing. > > You are only thinking in terms of execution speed. Yes, because my remark was made in the context of the particular benchmark supposed to be the topic of this thread. > Now think about memory use. Now you are moving the goal posts, But still, try to increase the chain length. I guess you'll find that the impact of range() -- in Chain.__init__() at least -- on the memory footprint is also negligable because the Person objects consume much more memory than the tempory list. > Using iterators instead of constructing lists is something > that needs to permeate your thinking about python or you will forever be > writing code that wastes memory, sometimes to a large extent. I like and use an iterator/generator/itertools-based idiom myself, but for "small" sequences lists are quite competitive, and the notion of what a small list might be is constantly growing. In general I think that if you want to promote a particular coding style you should pick an example where you can demonstrate actual benefits. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: updating dictionaries from/to dictionaries
On Mon, 11 Aug 2008 00:27:46 -0700, Brandon wrote:
> This should be pretty simple: I have two dictionaries, foo and bar. I
> am certain that all keys in bar belong to foo as well, but I also know
> that not all keys in foo exist in bar. All the keys in both foo and bar
> are tuples (in the bigram form ('word1', 'word2)). I have to prime foo
> so that each key has a value of 1.
The old way:
foo = {}
for key in all_the_keys:
foo[key] = 1
The new way:
foo = dict.fromkeys(all_the_keys, 1)
> The values for the keys in bar are
> variable integers. All I want to do is run a loop through foo, match
> any of its keys that also exist in bar, and add those key's values in
> bar to the preexisting value of 1 for the corresponding key in foo. So
> in the end the key,value pairs in foo won't necessarily be, for example,
> 'tuple1: 1', but also 'tuple2: 31' if tuple2 had a value of 30 in bar.
Harder to say what you want to do than to just do it.
The long way:
for key in foo:
if bar.has_key(key):
foo[key] = foo[key] + bar[key]
Probably a better way:
for key, value in foo.iteritems():
foo[key] = value + bar.get(key, 0)
You should also investigate the update method of dictionaries. From an
interactive session, type:
help({}.update)
then the Enter key.
--
Steven
--
http://mail.python.org/mailman/listinfo/python-list
Re: dynamically creating html code with python...
Hi,
Thanks for your patience.
I got the text displayed in the web browser with the following code:
[CODE]
f=StringIO.StringIO()
f.write('data analysis site')
f.write("This is a trial test")
f.write("")
print "Content-type: text/html\n"
print f.getvalue()
f.close()
[/CODE]
Now I am trying to put both the image and the text together, but the following
lines do not create the text with the chart that I expected.
[CODE]
f=StringIO.StringIO()
f.write('data analysis site')
f.write("This is a trial test")
f.write(urllib.urlopen("http://localhost/myLibs/ChartLib.py",urllib.urlencode(TheData)))
f.write("")
print "Content-type: text/html\n"
print f.getvalue()
f.close()
[/CODE]
I am wondering if urllib.urlopen is the command I need to revise.
Thanks for the pointers as well. I will look into them.
Jerry Hill <[EMAIL PROTECTED]> wrote :
> On Mon, Aug 11, 2008 at 12:26 PM, <[EMAIL PROTECTED]> wrote:
> > I have tried calling a script containing the code below from a web browser
> > and it did not get the text.
>
> You quoted my post that answered this question, but did not implement
> either of the two solutions I suggested. I continue to suggest that
> you either: f.seek(0) before you f.read(), or that you replace
> f.read() with f.getvalue().
>
> Also, you may want to read the docs on
> StringIO - http://docs.python.org/lib/module-StringIO.html
> File objects - http://docs.python.org/lib/bltin-file-objects.html
>
> --
> Jerry
> --
> http://mail.python.org/mailman/listinfo/python-list
--
http://mail.python.org/mailman/listinfo/python-list
Re: benchmark
Peter Otten: > In general I think that if you want to promote a particular coding style you > should pick an example where you can demonstrate actual benefits. That good thing is that Python 3 has only xrange (named range), so this discussion will be mostly over ;-) Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: New python module to simulate arbitrary fixed and infinite precision binary floating point
> > Is this related to minifloats? > > http://en.wikipedia.org/wiki/Minifloat > Strictly speaking, yes, although after a brief introduction to the general idea, the entry on that page focuses entirely on the interpretation of the values as integers. My code *only* represents the values in the same way as the regular-sized IEEE 754 formats, i.e. the smallest representable number is a fraction < 1, not the integer 1. I haven't supplied a way to use my classes to encode integers in this way, but it wouldn't be hard for someone to add that functionality in a sub-class of my ContextClass. Thanks for pointing out that page, anyway. I didn't know the smaller formats had been given their own name. -Rob -- http://mail.python.org/mailman/listinfo/python-list
Re: benchmark
Peter Otten wrote: Kris Kennaway wrote: Peter Otten wrote: [EMAIL PROTECTED] wrote: On Aug 10, 10:10 pm, Kris Kennaway <[EMAIL PROTECTED]> wrote: jlist wrote: I think what makes more sense is to compare the code one most typically writes. In my case, I always use range() and never use psyco. But I guess for most of my work with Python performance hasn't been a issue. I haven't got to write any large systems with Python yet, where performance starts to matter. Hopefully when you do you will improve your programming practices to not make poor choices - there are few excuses for not using xrange ;) Kris And can you shed some light on how that relates with one of the zens of python ? There should be one-- and preferably only one --obvious way to do it. For the record, the impact of range() versus xrange() is negligable -- on my machine the xrange() variant even runs a tad slower. So it's not clear whether Kris actually knows what he's doing. You are only thinking in terms of execution speed. Yes, because my remark was made in the context of the particular benchmark supposed to be the topic of this thread. No, you may notice that the above text has moved off onto another discussion. Kris -- http://mail.python.org/mailman/listinfo/python-list
dict.update() useful or not?
dict1.update(dict2) is of course equivalent to this code: for key, value in dict2.iteritems(): dict1[key] = value Note that it replaces values in dict1 with the value taken from dict2. I don't know about other people, but I more often want to keep the values in dict1 regardless of what's in dict2, and only add items from dict2 if it is new key. Like this: for key, value in dict2.iteritems(): if not dict1.has_key(key): dict1[key] = value Here's some code modified from something I wrote the other day: import urllib2 def create_request(url, headers): tmp = DEFAULT_HEADERS.copy() tmp.update(headers) req = urllib2.Request(url, None, tmp) # ... return req There's the faintest of code smells to me. I would prefer to write something like this: def create_request(url, headers): headers.update(DEFAULT_HEADERS) req = urllib2.Request(url, None, headers) # ... return req but of course this second example does the Wrong Thing, replacing explicit headers with default values. What do other people find? Do you find use for dict.update()? What other idioms do you use for combining dictionaries? -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: eval or execute, is this the (most) correct way ?
Steven D'Aprano wrote: On Mon, 11 Aug 2008 17:26:56 +0200, Stef Mientki wrote: I'm trying to make an editor with an integrated Shell. ... Is this the (most) correct / elegant way, or are there better solutions ? The best solution is not to re-invent the wheel: "import code" is the way to emulate Python's interactive interpreter. sorry, but that confuses me even more, I don;t have a file / module, just a workspace and one or more lines of code in memory. Try running "python -m code" at a regular shell (not the Python shell, your operating system's shell). I might have been not clear enough, I'm trying to build an python-IDE, so I definitely want to run code from memory. cheers, Stef Doing a search of the file code.py, I don't find the string "eval" at all. My guess is that your approach is probably not the best way. -- http://mail.python.org/mailman/listinfo/python-list
Re: dict.update() useful or not?
Steven D'Aprano <[EMAIL PROTECTED]> wrote: > dict1.update(dict2) is of course equivalent to this code: > > for key, value in dict2.iteritems(): > dict1[key] = value > > Note that it replaces values in dict1 with the value taken from dict2. I > don't know about other people, but I more often want to keep the values > in dict1 regardless of what's in dict2, and only add items from dict2 if > it is new key. Like this: > > for key, value in dict2.iteritems(): > if not dict1.has_key(key): > dict1[key] = value > If you don't actually need to mutate dict1 in-place then just use update for this: d = dict(dict2) d.update(dict1) dict1 = d > There's the faintest of code smells to me. I would prefer to write > something like this: > > def create_request(url, headers): > headers.update(DEFAULT_HEADERS) > req = urllib2.Request(url, None, headers) > # ... > return req > > but of course this second example does the Wrong Thing, replacing > explicit headers with default values. There's a second code smell with that: even if it did what you want it isn't nice to mutate the parameter passed in as headers. What if the caller wants to reuse the headers again for another call? Much nicer just to do: def create_request(url, headers): hdrs = dict(DEFAULT_HEADERS) hdrs.update(headers) req = urllib2.Request(url, None, hdrs) # ... return req -- http://mail.python.org/mailman/listinfo/python-list
Re: dynamically creating html code with python...
On Mon, Aug 11, 2008 at 10:05 AM, <[EMAIL PROTECTED]> wrote:
> Hi,
>
> Thanks for your patience.
>
> I got the text displayed in the web browser with the following code:
>
> [CODE]
> f=StringIO.StringIO()
> f.write('data analysis site')
> f.write("This is a trial test")
> f.write("")
>
> print "Content-type: text/html\n"
> print f.getvalue()
> f.close()
> [/CODE]
>
> Now I am trying to put both the image and the text together, but the
> following lines do not create the text with the chart that I expected.
>
> [CODE]
> f=StringIO.StringIO()
> f.write('data analysis site')
> f.write("This is a trial test")
> f.write(urllib.urlopen("http://localhost/myLibs/ChartLib.py",urllib.urlencode(TheData)))
> f.write("")
>
> print "Content-type: text/html\n"
> print f.getvalue()
> f.close()
> [/CODE]
>
> I am wondering if urllib.urlopen is the command I need to revise.
>
> Thanks for the pointers as well. I will look into them.
>
>
>
>
> Jerry Hill <[EMAIL PROTECTED]> wrote :
>
>> On Mon, Aug 11, 2008 at 12:26 PM, <[EMAIL PROTECTED]> wrote:
>> > I have tried calling a script containing the code below from a web browser
>> > and it did not get the text.
>>
>> You quoted my post that answered this question, but did not implement
>> either of the two solutions I suggested. I continue to suggest that
>> you either: f.seek(0) before you f.read(), or that you replace
>> f.read() with f.getvalue().
>>
>> Also, you may want to read the docs on
>> StringIO - http://docs.python.org/lib/module-StringIO.html
>> File objects - http://docs.python.org/lib/bltin-file-objects.html
>>
>> --
>> Jerry
It looks to me like you are opening the url, but never retrieving the
content of the url.
I think you may have better luck with urllib2 which has a read() method.
http://docs.python.org/lib/urllib2-examples.html
--
Stand Fast,
tjg. [Timothy Grant]
--
http://mail.python.org/mailman/listinfo/python-list
Re: Missing exceptions in PEP 3107
> Maybe the following syntax would be even more intuitive:
>
> def foo(a: "a info", b: "b info") return "ret info" raise "exc info":
> return "hello world"
>
> I don't know how determined the "->" syntax is already.
That seems much more intuitive and extensible. The "->" syntax has
always bothered me. The main issue I see with it though is that it
might be confusing. Consider:
def foo(a, b) return 0:
return a + b
A person reading the code might be tempted to read the annotation and
think that it is the body. Maybe not a huge problem, but definitely
something that will come up occasionally.
> Consider the syntax set in concrete.
Why? Python syntax is always changing. If we can think of a better way
to do something, then there is no better time than today to bring it
up.
Having said that, I like the decorator idea too:
> @raises("exc info")
> def foo(a: "a info", b: "b info") -> "ret info":
> return "hello world"
And to this:
> Well, yes, but wasn't the whole point of PEP 3107 to get rid of such
> decorators and provide a single standard way of specifying this kind of
> info instead?
Maybe, but I think it also does two more things: 1. creates a standard
location for storing annotations, and 2. Keeps you from violating DRY
(http://en.wikipedia.org/wiki/DRY).
For instance:
@parameters(a="a info", b="b info")
@raises("exception info")
@returns("return info")
def foo(a, b):
pass
a and b are mentioned in both the definition and the "parameters"
decorator. This violates DRY since a change to the definition will
also require a change to the parameters decorator call. One could
argue that you could make the parameters decorator inspect the
function and apply the annotations positionally. That doesn't really
eliminate the problem, just muddles it. Moving or changing parameters
is still going to result in the need to change code in multiple
locations. The positional case is almost worse in that it will usually
result in the same amount of work, while being less explicit.
Using a single decorator for exception info (or even return info) does
not violate either of the two stated benefits. The exception
information would go into the standard annotations dictionary. The
raises decorator does not violate DRY any more or less than it would
if added to the language syntax.
Matt
--
http://mail.python.org/mailman/listinfo/python-list
Re: Video information
dusans wrote: > Is there a py module, which would get me information of a movie file: > - resolution > - fps http://doc.freevo.org/2.0/Kaa#head-919960011a3523a465d1cacc57f2f8e7b0e8ad00 (I haven't used it myself) Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: for x,y in word1, word2 ?
On Mon, Aug 11, 2008 at 8:44 AM, Casey <[EMAIL PROTECTED]> wrote: > My first thought is that you should be looking at implementations of > Hamming Distance. If you are actually looking for something like > SOUNDEX you might also want to look at the double metaphor algorithm, > which is significantly harder to implement but provides better > matching and is less susceptible to differences based on name origins. > -- > http://mail.python.org/mailman/listinfo/python-list > I responded in the thread of the poster's original message on this subject, but will do the same here. I have a horribly ugly version of the double-metaphone algorithm in python that does work, and may be of some use in solving this problem. -- Stand Fast, tjg. [Timothy Grant] -- http://mail.python.org/mailman/listinfo/python-list
Re: Eclipse, Python, wxPython and code completion
[EMAIL PROTECTED] wrote: Hello, I've installed Eclipse, Python 2.5 and wxPython on Ubuntu 8.04. The problem is that I can't get code completion for wx module. I don't know if it occurs the same with other libraries outside the python "core". If I compile/run my code containing the wx library, I get an application running correctly, so it looks that definition works fine. Obviously, the obstacle is that I don't know (I don't want to either) the name of every method of every wxPython class so it's difficult to develop anything within this environment. In the IDE I use (under winXP), sometimes the wx dictionairy is available, sometimes it's not. It's totally unclear to me why this happens, but I noticed that it helps, to import the wx library as one of the very first import statements. cheers, Stef Thanks a lot Note: I'm a newbie-coming-from-"Billy's"-WindowsXP -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: dynamically creating html code with python...
[EMAIL PROTECTED] wrote:
> Hi,
>
> Thanks for your patience.
>
> I got the text displayed in the web browser with the following code:
>
> [CODE]
> f=StringIO.StringIO()
> f.write('data analysis site')
> f.write("This is a trial test")
> f.write("")
>
> print "Content-type: text/html\n"
> print f.getvalue()
> f.close()
> [/CODE]
>
> Now I am trying to put both the image and the text together, but the
> following lines do not create the text with the chart that I expected.
>
> [CODE]
> f=StringIO.StringIO()
> f.write('data analysis site')
> f.write("This is a trial test")
>
f.write(urllib.urlopen("http://localhost/myLibs/ChartLib.py",urllib.urlencode(TheData)))
> f.write("")
>
> print "Content-type: text/html\n"
> print f.getvalue()
> f.close()
> [/CODE]
>
> I am wondering if urllib.urlopen is the command I need to revise.
>
> Thanks for the pointers as well. I will look into them.
That's bogus. instead of the urllib-stuff, you need to write out a -tag
with the src pointing to your image - most probably like this:
Diez
--
http://mail.python.org/mailman/listinfo/python-list
Re: Video information
2008/8/9 dusans <[EMAIL PROTECTED]> > Is there a py module, which would get me information of a movie file: > - resolution > - fps > -- > http://mail.python.org/mailman/listinfo/python-list > if you have linux installed you can use gstreamer and the bindings pygst -tobias -- http://mail.python.org/mailman/listinfo/python-list
Inheritance crossover packages
Hello group, I'm having a seemingly simple problem. I want to generate a hierarchy of modules, like this one: GenerationScripts/ GenerationScripts/dhcp GenerationScripts/bind9 And the files: GenerationScripts/dhcp/__init__.py GenerationScripts/bind9/generator.py GenerationScripts/bind9/__init__.py GenerationScripts/mastergen.py GenerationScripts/__init__.py All packages (bind9, dhcp) should inherit from the master generator "mastergen". I'm at the very beginning: $ cat GenerationScripts/__init__.py import bind9 #import dhcpd $ cat GenerationScripts/bind9/__init__.py import GenerationScripts.bind9.generator $ cat GenerationScripts/bind9/generator.py from GenerationScripts import mastergen class generator(mastergen): def __init__(self): print "init bind9 generator" Now what happens when I import GenerationScripts and try to create a instance of GenerationScripts.bind9.generator is the following: Traceback (most recent call last): File "./Generate.py", line 3, in import GenerationScripts File "/home/joe/x/GenerationScripts/__init__.py", line 3, in import bind9 File "/home/joe/x/GenerationScripts/bind9/__init__.py", line 4, in import GenerationScripts.bind9.generator File "/home/joe/x/GenerationScripts/bind9/generator.py", line 7, in class generator(mastergen): TypeError: Error when calling the metaclass bases module.__init__() takes at most 2 arguments (3 given) I really don't get it - and I've searched and found the same problem, read the descirption - but still don't get it. What's happening here? Regards, Johannes -- "Wer etwas kritisiert muss es noch lange nicht selber besser können. Es reicht zu wissen, daß andere es besser können und andere es auch besser machen um einen Vergleich zu bringen." - Wolfgang Gerber in de.sci.electronics <[EMAIL PROTECTED]> -- http://mail.python.org/mailman/listinfo/python-list
A Question about ctypes and a function f(void **)
Hello, I have a C function f(void**,int *), in which it writes some information (it is a RGB32 image). Here is what i do rowlength=c_int() data=c_void_p() d=pointer(data) f(d,byref(rowlength) The call works (no segmentation fault), now how do i access the data in d? Because i need to pass it to a another function QImage that takes void* as its first parameter. If i do d.contents i get c_void_p(3067478024L) All suggestions welcome. Regards Saptarshi -- http://mail.python.org/mailman/listinfo/python-list
Re: for x,y in word1, word2 ?
Thanks, Timothy. I'm pretty sure that there is no such thing as a "beautiful" implementation of double-metaphone but I would personally like to have a copy of your python implementation. I have a fairly elegant version of the original metaphone algorithm I wrote myself (in PERL, many years ago) but I've never found the time to reverse-engineer the original C++ code for double-metaphone and "pythonize" it. On Mon, Aug 11, 2008 at 2:08 PM, Timothy Grant <[EMAIL PROTECTED]> wrote: > On Mon, Aug 11, 2008 at 8:44 AM, Casey <[EMAIL PROTECTED]> wrote: >> My first thought is that you should be looking at implementations of >> Hamming Distance. If you are actually looking for something like >> SOUNDEX you might also want to look at the double metaphor algorithm, >> which is significantly harder to implement but provides better >> matching and is less susceptible to differences based on name origins. >> -- >> http://mail.python.org/mailman/listinfo/python-list >> > > I responded in the thread of the poster's original message on this > subject, but will do the same here. I have a horribly ugly version of > the double-metaphone algorithm in python that does work, and may be of > some use in solving this problem. > > -- > Stand Fast, > tjg. [Timothy Grant] > -- http://mail.python.org/mailman/listinfo/python-list
Professional Grant Proposal Writing Workshop (August 2008: Boston, Massachusetts - University of Phoenix Campus)
The Grant Institute: Certificate in Professional Program Development and Grant Communication will be held at the University of Phoenix - Burlington Campus, August 18 - 22, 2008. Interested development professionals, researchers, faculty, and graduate students should register as soon as possible, as demand means that seats will fill up quickly. Please forward, post, and distribute this e-mail to your colleagues and listservs. All participants will receive certification in professional grant writing from the Institute, as well as 3.5 CEU units. For more information call (888) 824 - 4424 or visit The Grant Institute at www.thegrantinstitute.com Please find the program description below: The Grant Institute Certificate in Professional Program Development and Grant Communication will be held at the University of Phoenix - Burlington Campus Burlington, Massachusetts August 18 - 22, 2008 8:00 AM - 5:00 PM The Grant Institute: Certificate in Professional Program Development and Grant Communication is a five-day intensive and interactive experience in which participants will be led through the program development, grant writing, and funding acquisition processes through the completion of four courses. The Grant Institute is not a seminar. Participants will actively engage in exercises and activities designed to strengthen their mastery of grant acquisition. Through the completion of varying assignments, students will leave The Grant Institute with a real grant proposal outline complete with quality research, solid content, and expert review. The Grant Institute focuses on combining the fundamentals of grant proposal writing with expert knowledge of communication principles such as Strategic Research, Persuasion, Argumentation, and Framing. The Grant Institute trainers and consultants do not merely lecture participants, but act as personal consultants and coaches dedicated to encouraging participants to succeed beyond their own expectations. While The Grant Institute uses collaboration and small groups for many exercises, each participant will work on their organization's pro ject. Participants are not overwhelmed with negativity or discouragement, but will be given the highest level of expertise to generate confidence in pursuing any funding project. At The Grant Institute , participants don't j ust learn to write grant proposals from top to bottom. Participants become specialists in our unique area of expertise: Grant Communication. Simply put, this is not your grandfather's grantwriting workshop. Our graduates are strategic, innovative, and confident. Whether you are new to professional grantwriting, or an experienced professional, you will not want to miss The Grant Institute. The Grant Institute consists of four (4) courses that will be completed during the five-day workshop. (1) Program Development and Evaluation This course is centered around the belief that "it's all about the program." This intensive course will teach professional program development essentials and program evaluation. While most grantwriting "workshops" treat program development and evaluation as separate from the writing of a proposal, this class will teach students the relationship between overall program planning and all strategic communication, including grantwriting. Consistent in our belief in grant communication, this class encourages students to understand successful program development and to think strategically about funding as an integral part of the overall program planning process. This class turns students into experts by teaching how to take ideas and concepts and turn them into professionally developed programs. (2) Advanced Grant Writing Designed for both the novice and experienced grantwriter, this course will make each student an overall fundraising communication specialist. In addition to teaching the basic components of a grant proposal, successful approaches, and the do's and don'ts of grantwriting, this course is infused with expert principles that will lead to a mastery of the process. Strategy resides at the forefront of this course's intent to illustrate grantwriting as an integrated, multidimensional, and dynamic endeavor. Each student will learn to stop writing the grant and to start writing the story. Ultimately, this class will illustrate how each component of the grant proposal represents an opportunity to use proven techniques for generating support. (3) Strategic Grant Research At its foundation, this course will address the basics of foundation, corporation, and government grant research. However, this course will teach a strategic funding research approach that encourages students to see research not as something they do before they write a proposal, but as an integrated part of the grant seeking process. Students will be exposed to online and database research tools, as well as publications and directories which contain information
Re: for x,y in word1, word2 ?
On Mon, Aug 11, 2008 at 12:13 PM, Dave Webster <[EMAIL PROTECTED]> wrote:
> Thanks, Timothy. I'm pretty sure that there is no such thing as a "beautiful"
> implementation of double-metaphone but I would personally like to have a copy
> of your python implementation. I have a fairly elegant version of the
> original
> metaphone algorithm I wrote myself (in PERL, many years ago) but I've
> never found
> the time to reverse-engineer the original C++ code for double-metaphone and
> "pythonize" it.
>
> On Mon, Aug 11, 2008 at 2:08 PM, Timothy Grant <[EMAIL PROTECTED]> wrote:
>> On Mon, Aug 11, 2008 at 8:44 AM, Casey <[EMAIL PROTECTED]> wrote:
>>> My first thought is that you should be looking at implementations of
>>> Hamming Distance. If you are actually looking for something like
>>> SOUNDEX you might also want to look at the double metaphor algorithm,
>>> which is significantly harder to implement but provides better
>>> matching and is less susceptible to differences based on name origins.
>>> --
>>> http://mail.python.org/mailman/listinfo/python-list
>>>
>>
>> I responded in the thread of the poster's original message on this
>> subject, but will do the same here. I have a horribly ugly version of
>> the double-metaphone algorithm in python that does work, and may be of
>> some use in solving this problem.
>>
>> --
>> Stand Fast,
>> tjg. [Timothy Grant]
>>
>
This is truly cringe-worthy, and pretty much a direct port of the C++
code. It need unit tests (which are on my "to-do someday" list) but
even though it's ugly it does work and I have managed to do real work
with it.
--
Stand Fast,
tjg. [Timothy Grant]
#
# DMetaph.py
#
# Copyright 2006 by Timothy (rhacer) Grant
#
# Based on an algorithm and code by Lawrence Philips
#
# This code is licensed under the terms of the GNU Public License v2
#
import re
DEBUG = False
class DMetaph(str):
"""
DMetaph() creates a Double Metaphone encoding of the word passed in.
"""
def __init__(self, s):
self.s = s.upper() + ' ' # Padding allows safe indexing beyond the end
self.length = len(s)
self.last = self.length - 1
self.current = 0
self.primary = ""
self.secondary = ""
self.alternate = False
if self.StringAt(0, 2, 'GN', 'KN', 'PN', 'WR', 'PS'):
self.current += 1
if self.s[0] == 'X':
self.MetaphAdd('S')
self.current += 1
while len(self.primary) < 4 or len(self.secondary) < 4:
if DEBUG: print "processing character: %s current: %s length: %s" % (
self.s[self.current], self.current, self.length)
if self.current >= self.length:
break
self.ProcessString()
self.metaph = self.primary
self.metaph2 = ''
if len(self.metaph) > 4:
self.metaph = self.metaph[:4]
if self.alternate:
self.metaph2 = self.secondary
if len(self.metaph2) > 4:
self.metaph2 = self.metaph2[:4]
def SlavoGermanic(self):
if ('W' in self.s or 'K' in self.s
or 'CZ' in self.s or 'WITZ' in self.s):
return True
return False
def MetaphAdd(self, main, alt=None):
if main:
self.primary += main
if alt:
self.alternate = True
if (alt[0] <> ' '):
self.secondary += alt
else:
if (main[0] <> ' '):
self.secondary += main
def IsVowel(self, at):
if (at < 0) or (at > self.length):
return False
if self.s[at] in 'AEIOUY':
return True
return False
def StringAt(self, start, length, *sub_strings):
if self.s[start:start + length] in sub_strings:
return True
return False
def print_diags(self, section):
print"section: %s current: %s" % (section, self.current)
def ProcessString(self):
if self.IsVowel(self.current):
if DEBUG: self.print_diags('VOWEL')
if self.current == 0:
self.MetaphAdd('A')
self.current += 1
return
elif self.s[self.current] == 'B':
if DEBUG: self.print_diags('B')
self.MetaphAdd('P')
if self.s[self.current + 1] == 'B':
self.current += 2
else:
self.current += 1
return
elif self.s[self.current] == 'C':
if DEBUG: self.print_diags('C')
if (self.current > 1
and not self.IsVowel(self.current - 2)
and self.StringAt(self.current - 1, 3, 'ACH')
and self.s[self.current + 2] <> 'I'
RE: SSH utility
What about pexpect? http://www.noah.org/wiki/Pexpect -Original Message- From: Alan Franzoni [mailto:[EMAIL PROTECTED] Sent: Monday, August 11, 2008 5:41 AM To: python-list@python.org Subject: Re: SSH utility James Brady was kind enough to say: > Hi all, > I'm looking for a python library that lets me execute shell commands > on remote machines. > > I've tried a few SSH utilities so far: paramiko, PySSH and pssh; > unfortunately all been unreliable, and repeated questions on their > respective mailing lists haven't been answered... Twisted conch seems to be your last chance :-) -- Alan Franzoni <[EMAIL PROTECTED]> - Remove .xyz from my email in order to contact me. - GPG Key Fingerprint: 5C77 9DC3 BD5B 3A28 E7BC 921A 0255 42AA FE06 8F3E -- http://mail.python.org/mailman/listinfo/python-list
Re: Inheritance crossover packages
Johannes Bauer a écrit : Hello group, I'm having a seemingly simple problem. I want to generate a hierarchy of modules, like this one: GenerationScripts/ GenerationScripts/dhcp GenerationScripts/bind9 And the files: GenerationScripts/dhcp/__init__.py GenerationScripts/bind9/generator.py GenerationScripts/bind9/__init__.py GenerationScripts/mastergen.py GenerationScripts/__init__.py All packages (bind9, dhcp) should inherit from the master generator "mastergen". Sorry but this makes no sense. inheritance is a class feature - packages and modules don't 'inherit'. I'm at the very beginning: $ cat GenerationScripts/__init__.py import bind9 #import dhcpd $ cat GenerationScripts/bind9/__init__.py import GenerationScripts.bind9.generator $ cat GenerationScripts/bind9/generator.py from GenerationScripts import mastergen class generator(mastergen): pep08 : class identifiers should be in CamelCase def __init__(self): print "init bind9 generator" here, mastergen is a module object, not a class object. This just can't work. What are you trying to do exactly ??? Now what happens when I import GenerationScripts and try to create a instance of GenerationScripts.bind9.generator is the following: Traceback (most recent call last): File "./Generate.py", line 3, in import GenerationScripts File "/home/joe/x/GenerationScripts/__init__.py", line 3, in import bind9 File "/home/joe/x/GenerationScripts/bind9/__init__.py", line 4, in import GenerationScripts.bind9.generator File "/home/joe/x/GenerationScripts/bind9/generator.py", line 7, in class generator(mastergen): TypeError: Error when calling the metaclass bases module.__init__() takes at most 2 arguments (3 given) > I really don't get it - and I've searched and found the same problem, read the descirption - but still don't get it. What's happening here? What's happening is that you try to use a module instance (really: an instance of class 'module') as a base class - and, as a result, the 'module' class as a metaclass. But 1/ the 'module' class initializer's signature is not compatible with a metaclass signature, and 2/ anyway, the 'module' class constructor doesn't return a class object anyway. I don't know what you trying to do, but I suggest you (re)read the FineManual(tm)'s relevant sections, that is, sections about modules and packages, and sections about Python's 'new-style' object model. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python for Blackberry mobile phones
It would be also nice to see python on an iPhone On Mon, Aug 11, 2008 at 8:29 AM, Timothy Grant <[EMAIL PROTECTED]>wrote: > On Sun, Aug 10, 2008 at 9:54 PM, <[EMAIL PROTECTED]> wrote: > > I'm looking for a version of Python for Blackberry mobile phones - has > > anyone heard of such a thing? I've been googling this topic without > success. > > > > Thanks, > > Malcolm > > My understanding is that the BB's run Java, so there *may* be some > chance that it might be possible to get Jython running on it. > > > -- > Stand Fast, > tjg. [Timothy Grant] > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://www.goldwatches.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: dynamically creating html code with python...
[EMAIL PROTECTED] a écrit :
Sorry, my fault...
I am trying to build a web application for data analysis. Basically
some data will be read from a database and passed to a python script
(myLibs.py) to build an image as follows.
[CODE]
f=urllib.urlopen("http://localhost/path2Libs/myLibs.py",urllib.urlencode(TheData))
print "Content-type: image/png\n"
> print f.read()
> f.close()
> [/CODE]
This section behaves as expected, and I can see the chart on the
web-page.
Indeed. Using an http request to call a local script is totally
braindead, but this is another problem.
Now, I would like to add some text and possibly more charts
(generated in the same way) to my web-page.
Which one ? What you showed is a way to generate an image resource (with
mime-type 'image/png'), not an html page resource (mime-type :
text/html). Images resources are not directly embedded in html pages -
they are *referenced* from web pages (using an tag), then it's up
to the user-agent (usually, the browser) to emit another http request to
get the image.
This is what I need help
with.
Not tested (obviously), but what you want is something like:
print "Content-type: text/html\n"
print """
data analysis site
This is a trial test
http://localhost/myLibs/ChartLib.py?%s"; />
""" % urllib.urlencode(TheData)
My question: How can I use python to dynamically add descriptive
comments (text), and possibly more charts to the web-page?
The code you showed so far either tried to add text/html to an image
(that is, binary data), or to embed the image's binary data into
text/html. None of this makes sense. Period. The problem is not with
Python. The problem is that you can't seriously hope to do web
programming without any knowledge of the http protocol.
Also and FWIW, you'd be better using a decent templating system (mako,
cheetah, genshi, tal, whatever fits your brain) instead of generating
html that way.
--
http://mail.python.org/mailman/listinfo/python-list
Re: Digitally sign PDF files
Hi, I'm developing an application with some reports and we're looking for advice. This reports should be openoffice.org .odf files, pdf files, and perhaps microsoft word files (.doc, .docx?) and must be digitally signed. Is out there some kind of libraries to ease this tasks? For signing you can use OpenSSL or the more complete M2crypto modules. But this is only the crypto part of the task. > * Access to the local user certificate store, and read PEM or PKCS12 > certificate files. If the certificate store is just a file, both packages can to this. If the store is some otehr format or maybe the Windows registry, some additional functions are required, but should be easy to implement. > * Read, parse and validate user certificates This can be easily done with both. * Sign documents: as a binary stream, within an specific document (pdf, odt, doc) This is the hardest part of the task, since the signature has to be embedded into the document. -- Schönen Gruß - Regards Hartmut Goebel Goebel Consult Spezialist für IT-Sicherheit in komplexen Umgebungen http://www.goebel-consult.de -- http://mail.python.org/mailman/listinfo/python-list
Full Time Python developer position in Dallas TX
please respond with resume. Candidates must be in the USA. -- http://mail.python.org/mailman/listinfo/python-list
Re: A Question about ctypes and a function f(void **)
sapsi <[EMAIL PROTECTED]> wrote: > I have a C function f(void**,int *), in which it writes some > information (it is a RGB32 image). > > Here is what i do > rowlength=c_int() > data=c_void_p() > d=pointer(data) > f(d,byref(rowlength) > The call works (no segmentation fault), now how do i access the data > in d? Because i need to pass it to a another function QImage that > takes void* as its first parameter. > > If i do d.contents i get c_void_p(3067478024L) You almost answered your own question! d.contents is a c_void_p ie a (void *) so you can pass d.contents to QImage directly I would have thought. If you want to actually read the data from python then you'll need to cast it to some other pointer type than c_void_p first, eg >>> d c_void_p(136692916) >>> s = c_char_p(d.value) >>> s c_char_p(136692916) >>> s.value 'hello' >>> or use ctypes.memmove to copy the data out to somewhere else. -- Nick Craig-Wood <[EMAIL PROTECTED]> -- http://www.craig-wood.com/nick -- http://mail.python.org/mailman/listinfo/python-list
Custom PyQt4 Slots
Is it possible to create custom PyQt4 Slots, i have searched high and low to no avail; I have an application that can set animation speed to different levels, i want the user to alter this, now quite clearly i can write a single function to control setting any speed with something like: def setSpeed(self, speed): some code in here to set speed but if i have mutiple option for speed do i have to connect them all to seperate callables for each individual speed which each in turn call setSpeed with their respective speeds or can i create a slot that can simply pass an integer to setSpeed in much the same way as the built-in SIGNAL from something like a combo box can pass its current index?? i realise this could be impossibly, knowing that would be equally useful and i will just work around it, albeit with more verbose code!! thanks ff -- http://mail.python.org/mailman/listinfo/python-list
Re: list question... unique values in all possible unique spots
On Sat, 09 Aug 2008 08:07:26 -0700, Mensanator wrote: > 40329146112660563558400 I think it's only 4 septillion. Perfectly manageable. ** Posted from http://www.teranews.com ** -- http://mail.python.org/mailman/listinfo/python-list
Re: Custom PyQt4 Slots
ff schrieb: Is it possible to create custom PyQt4 Slots, i have searched high and low to no avail; I have an application that can set animation speed to different levels, i want the user to alter this, now quite clearly i can write a single function to control setting any speed with something like: def setSpeed(self, speed): some code in here to set speed but if i have mutiple option for speed do i have to connect them all to seperate callables for each individual speed which each in turn call setSpeed with their respective speeds or can i create a slot that can simply pass an integer to setSpeed in much the same way as the built-in SIGNAL from something like a combo box can pass its current index?? i realise this could be impossibly, knowing that would be equally useful and i will just work around it, albeit with more verbose code!! http://docs.huihoo.com/pyqt/pyqt4.html#pyqt-signals-and-qt-signals """ PyQt allows new signals to be defined dynamically. The act of emitting a PyQt signal implicitly defines it. PyQt v4 signals are also referenced using the QtCore.SIGNAL() function. """ Work on your google-fu... Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: list question... unique values in all possible unique spots
On Mon, 11 Aug 2008 13:46:10 -0700, Tobiah wrote: > On Sat, 09 Aug 2008 08:07:26 -0700, Mensanator wrote: > >> 40329146112660563558400 > > I think it's only 4 septillion. I meant 403. ** Posted from http://www.teranews.com ** -- http://mail.python.org/mailman/listinfo/python-list
Re: list question... unique values in all possible unique spots
On Mon, 11 Aug 2008 13:46:10 -0700, Tobiah wrote: > On Sat, 09 Aug 2008 08:07:26 -0700, Mensanator wrote: > >> 40329146112660563558400 > > I think it's only 4 septillion. I meant to say 403. ** Posted from http://www.teranews.com ** -- http://mail.python.org/mailman/listinfo/python-list
Re: Custom PyQt4 Slots
Diez B. Roggisch schrieb: ff schrieb: Is it possible to create custom PyQt4 Slots, i have searched high and low to no avail; I have an application that can set animation speed to different levels, i want the user to alter this, now quite clearly i can write a single function to control setting any speed with something like: def setSpeed(self, speed): some code in here to set speed but if i have mutiple option for speed do i have to connect them all to seperate callables for each individual speed which each in turn call setSpeed with their respective speeds or can i create a slot that can simply pass an integer to setSpeed in much the same way as the built-in SIGNAL from something like a combo box can pass its current index?? i realise this could be impossibly, knowing that would be equally useful and i will just work around it, albeit with more verbose code!! http://docs.huihoo.com/pyqt/pyqt4.html#pyqt-signals-and-qt-signals """ PyQt allows new signals to be defined dynamically. The act of emitting a PyQt signal implicitly defines it. PyQt v4 signals are also referenced using the QtCore.SIGNAL() function. """ And not to forget: """ A slot is a function (in PyQt a slot is any Python callable). """ It's as easy as it can get. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Digitally sign PDF files
On 11 ago, 22:29, Hartmut Goebel <[EMAIL PROTECTED]> wrote: > > I'm developing an application with some reports and we're looking for > > advice. This reports should be openoffice.org .odf files, pdf files, > > and perhaps microsoft word files (.doc, .docx?) and must be digitally > > signed. Is out there some kind of libraries to ease this tasks? > > For signing you can use OpenSSL or the more complete M2crypto modules. > But this is only the crypto part of the task. M2Crypto? I didn't know of it... surely I must check it. It's a very delicate component (security and reliability is a must) and don't know how openssl works in windows environments. > > * Access to the local user certificate store, and read PEM or PKCS12 > > certificate files. > > If the certificate store is just a file, both packages can to this. If > the store is some otehr format or maybe the Windows registry, some > additional functions are required, but should be easy to implement. Certificates can be both: PKCS12 (.p12) files and under the windows certificate store. The best option could be some kind of thin wrapper around windows CryotoAPI, so access to hardware tokens and smartcard readers should be easy because under Linux everything seems tied to Mozilla NSS libraries. > > * Sign documents: as a binary stream, within an specific document > > (pdf, odt, doc) > > This is the hardest part of the task, since the signature has to be > embedded into the document. OpenOffice.org uses XML DSIG (libxmlsec, libxml2) as stated here[1] but I can't find more than this[2] implementation/wrapper of libxmlsec PDF signing... I can't find something like iText for Python... I've finded examples like this[3] based on Jython... perhaps I should look at jython because java 1.6 has full access to Windows CryptoAPI and full XML-DSIG support[4] IronPython could also be an interesting option for obvious reasons and there's and iText port for .NET Thanks [1] http://marketing.openoffice.org/ooocon2004/presentations/friday/timmermann_digital_signatures.pdf [2] http://xmlsig.sourceforge.net/build.html [3] http://kelpi.com/script/00cd7c [4] http://java.sun.com/javase/6/docs/technotes/guides/security/xmldsig/XMLDigitalSignature.html -- http://mail.python.org/mailman/listinfo/python-list
Re: eval or execute, is this the (most) correct way ?
> So AFAIK, sometimes I've to use eval and sometimes I need exec, > so I use the following code (global / local dictionary parameters are > left out in this example): > > > Is this the (most) correct / elegant way, or are there better solutions ? You should be using compile with the "single" start symbol, and then use eval on the resulting code option. > I read somewhere that exec is going to disappear, That's not true. exec stops being a statement, and becomes a function (like print). Regards, Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: dict.update() useful or not?
>> def create_request(url, headers): >> headers.update(DEFAULT_HEADERS) >> req = urllib2.Request(url, None, headers) >> # ... >> return req >> >> but of course this second example does the Wrong Thing, replacing >> explicit headers with default values. > > There's a second code smell with that: even if it did what you want it > isn't nice to mutate the parameter passed in as headers. What if the caller > wants to reuse the headers again for another call? Just in case it isn't clear what the problem with that code is: create_request is a function, ie. it returns a value. As such, it shouldn't have any side effects. If it has side effects, it should be considered a procedure, and return None. Regards, Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Custom PyQt4 Slots
On Aug 11, 9:56 pm, "Diez B. Roggisch" <[EMAIL PROTECTED]> wrote: > Diez B. Roggisch schrieb: > > > > > ff schrieb: > >> Is it possible to create custom PyQt4 Slots, i have searched high and > >> low to no avail; > > >> I have an application that can set animation speed to different > >> levels, i want the user to alter this, now quite clearly i can write a > >> single function to control setting any speed with something like: > > >> def setSpeed(self, speed): > >> some code in here to set speed > > >> but if i have mutiple option for speed do i have to connect them all > >> to seperate callables for each individual speed which each in turn > >> call setSpeed with their respective speeds or can i create a slot that > >> can simply pass an integer to setSpeed in much the same way as the > >> built-in SIGNAL from something like a combo box can pass its current > >> index?? > > >> i realise this could be impossibly, knowing that would be equally > >> useful and i will just work around it, albeit with more verbose code!! > > >http://docs.huihoo.com/pyqt/pyqt4.html#pyqt-signals-and-qt-signals > > > """ > > PyQt allows new signals to be defined dynamically. The act of emitting a > > PyQt signal implicitly defines it. PyQt v4 signals are also referenced > > using the QtCore.SIGNAL() function. > > """ > > And not to forget: > > """ > A slot is a function (in PyQt a slot is any Python callable). > """ > > It's as easy as it can get. > > Diez Sorry, yeah getting confused between SIGNALS and SLOTS, thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: dynamically creating html code with python...
This makes sense. Thanks!
I managed to get what I wanted with something similar to what you suggested:
[CODE]
print "Content-Type: text/html\n\n"
html="""
data analysis site
This is a test
After image text
"""
print html % myChartsLib.myPlotType(TheData)
[/CODE]
and the script returns
[CODE]
f = StringIO.StringIO()
pylab.savefig(f)
return 'data:image/png,' + urllib.quote(f.getvalue())
[/CODE]
This works fine in Firefox, but not in IE7. Any ideas why?
BTW, you are right about me not having a clue about http. It's the first time I
try to do something with it. May be you could point me out to some good links
where I can learn.
I will take a look into Mako too.
Thanks again.
Bruno Desthuilliers <[EMAIL PROTECTED]> wrote :
> [EMAIL PROTECTED] a écrit :
> > Sorry, my fault...
> >
> > I am trying to build a web application for data analysis. Basically
> > some data will be read from a database and passed to a python script
> > (myLibs.py) to build an image as follows.
> >
> > [CODE]
> > f=urllib.urlopen("http://localhost/path2Libs/myLibs.py",urllib.urlencode(TheData))
> > print "Content-type: image/png\n"
> > print f.read()
> > f.close()
> > [/CODE]
> >
> > This section behaves as expected, and I can see the chart on the
> > web-page.
>
> Indeed. Using an http request to call a local script is totally
> braindead, but this is another problem.
>
> > Now, I would like to add some text and possibly more charts
> > (generated in the same way) to my web-page.
>
> Which one ? What you showed is a way to generate an image resource (with
> mime-type 'image/png'), not an html page resource (mime-type :
> text/html). Images resources are not directly embedded in html pages -
> they are *referenced* from web pages (using an tag), then it's up
> to the user-agent (usually, the browser) to emit another http request to
> get the image.
>
>
> > This is what I need help
> > with.
>
> Not tested (obviously), but what you want is something like:
>
> print "Content-type: text/html\n"
> print """
>
>
> data analysis site
>
>
> This is a trial test
> http://localhost/myLibs/ChartLib.py?%s"; />
>
>
> """ % urllib.urlencode(TheData)
>
>
> > My question: How can I use python to dynamically add descriptive
> > comments (text), and possibly more charts to the web-page?
>
> The code you showed so far either tried to add text/html to an image
> (that is, binary data), or to embed the image's binary data into
> text/html. None of this makes sense. Period. The problem is not with
> Python. The problem is that you can't seriously hope to do web
> programming without any knowledge of the http protocol.
>
> Also and FWIW, you'd be better using a decent templating system (mako,
> cheetah, genshi, tal, whatever fits your brain) instead of generating
> html that way.
> --
> http://mail.python.org/mailman/listinfo/python-list
--
http://mail.python.org/mailman/listinfo/python-list
Re: eval or execute, is this the (most) correct way ?
Martin v. Löwis wrote: So AFAIK, sometimes I've to use eval and sometimes I need exec, so I use the following code (global / local dictionary parameters are left out in this example): Is this the (most) correct / elegant way, or are there better solutions ? You should be using compile with the "single" start symbol, and then use eval on the resulting code option. thanks Martin, but when I read the doc (of one of the many) "compile" functions, I see 2 problems: - I still have to provide "kind" as exec or eval - I can not specify the global and local namespace (which is essential for me) I read somewhere that exec is going to disappear, That's not true. exec stops being a statement, and becomes a function (like print). That's good to hear, as I already didn't realize it could also be used as a statement ;-) cheers, Stef Regards, Martin -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
