RE: seaching a list...
At Thursday 10/8/2006 21:54, bruce wrote: the issue i'm having is that i'm going to have to compare multiple rows of information to the information in the db. so essentially i'd have to do a hit to the db, for each row of information i want to compare if i did it your way... (which was what i had thought about) the issue of doing the string/list compare/search is that i can get everything from the db with one call... i can then iterate through memory for each of my row information that i'm searching to see if it exists in the db... memory searches should be faster than the network overhead, and the associated multiple db calls... should... are you sure? How many rows on the database? how many rows to compare? network overhead? Do some timing/performance tests to evaluate that. Things aren't always as you expect. Gabriel Genellina Softlab SRL __ Preguntá. Respondé. Descubrí. Todo lo que querías saber, y lo que ni imaginabas, está en Yahoo! Respuestas (Beta). ¡Probalo ya! http://www.yahoo.com.ar/respuestas -- http://mail.python.org/mailman/listinfo/python-list
Re: semi-Newbie question
In <[EMAIL PROTECTED]>, len wrote: > mycode = "TagToSQL['mySQLfieldname'] = Tagfile['Value']" > exec mycode Why do you use ``exec`` here? Why not simply:: TagToSQL['mySQLfieldname'] = Tagfile['Value'] Ciao, Marc 'BlackJack' Rintsch -- http://mail.python.org/mailman/listinfo/python-list
Re: sys.platform documentation?
Op 10-aug-2006, om 19:18 heeft Simon Forman het volgende geschreven:
> It might be a good idea to write a brief script to print out
> sys.platform, platform.platform(), platform.uname(), etc.. and
> post it
> here for people to run and post their results.
>
> Peace,
> ~Simon
>
> --
> http://mail.python.org/mailman/listinfo/python-list
sys.platform is actually not needed anymore once you use platform, it
seems.
So if you run this script:
--
import platform
platform.platform()
platform.uname()
--
You will get all the information that is necessary. And then you just
need to provide it with a human-determined name of the operating
system you're using.
My output:
>>> import platform
>>> platform.platform()
'Darwin-8.6.0-Power_Macintosh-powerpc-32bit'
>>> platform.uname()
('Darwin', 'imac-g5-van-michiel-sikma.local', '8.6.0', 'Darwin
Kernel Version 8.6.0: Tue Mar 7 16:58:48 PST 2006;
root:xnu-792.6.70.obj~1/RELEASE_PPC', 'Power Macintosh', 'powerpc')
And I'm on Mac OS X 10.4.6 on a G5 iMac.
Michiel
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kerberos under windows
Hi i'd like to know, is there any package like pykpass for windows? Or how to use this under windows. I need to authenticate users with kerberos under windows environment and have no idea how. Thanks for help. Kamil Malinka -- http://mail.python.org/mailman/listinfo/python-list
Python script setup
Hi all, When I want setup my script: I write: from distutils.core import setup setup(name="myscript", version='1.0', scripts=["myscripts.py"]) or some else example,error is Traceback (most recent call last): File "", line 1, in -toplevel- setup(name="myscript", version='1.0', scripts=["myscripts.py"]) File "C:\Python24\distutils\core.py", line 101, in setup _setup_distribution = dist = klass(attrs) File "C:\Python24\distutils\dist.py", line 130, in __init__ setattr(self, method_name, getattr(self.metadata, method_name)) AttributeError: DistributionMetadata instance has no attribute 'get___doc__' -- http://mail.python.org/mailman/listinfo/python-list
RE: sys.platform documentation?
[Michiel Sikma]
| So if you run this script:
| --
| import platform
| platform.platform()
| platform.uname()
| --
| You will get all the information that is necessary. And then
| you just
| need to provide it with a human-determined name of the operating
| system you're using.
If you're interested:
>>> platform.platform()
'Windows-XP-5.1.2600-SP2'
>>> platform.uname()
('Windows', 'VOGBP350', 'XP', '5.1.2600', '', '')
>>>
TJG
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Re: "running" code on client side with cherrypy?
Mr BigSmoke wrote: > Tnx Jay... as i supposed there's no easy solution... I just thought > that, maybe, being on an intranet there was a possible solution... > About pysvn a tortoise... i do use tortoiseSVN and t works really > really fine.. we (developers) use it, but i'm writting server for > "normal" users that can checkout our applications releases... If the goal is to allow final users to download releases, then it's simpler - you just have to serve them with archived (zipped, tarballs, Python-Eggs, whatever) versions of the last release so they can download it - the browser will then ask them where tehy want to save it. -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
Bayazee wrote: > hi > can we hide a python code ? > if i want to write a commercial software can i hide my source code from > users access ? > we can conver it to pyc but this file can decompiled ... so ...!! It's just the same with java byte-code or machine code. FWIW, I had a cracked (and localised) copy of Steinberg's Cubase midi sequencer v1.1 *before* v1.0 was publicly available in France... And believe me, they had made their best to protect the software (dongle etc...). The only secure way to protect "critical" code is to not distribute it - make it run on your own server, and require the application to access the server. -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
Steven D'Aprano wrote: (snip) > If you really want something which compiles to machine code, then Python > is not the language for you. Use another language. > But that won't protect your software from piracy anyway. -- http://mail.python.org/mailman/listinfo/python-list
Component framework
Hi all, some time ago I've seen an interesting component framework for Python but I don't remember the name. I remember only one example. There were two components: Wheel and Car, Wheel were then inserted four times into Car and so on. This framework has had lazy instantiation of child components. Does anybody know the name of this framework? Thanks, Honza -- http://mail.python.org/mailman/listinfo/python-list
Reading unformatted big-endian files
Hello NG, that may sound a silly question, but I didn't find anything really clear about the issue of reading unformatted big endian files with Python. What I was doing till now, was using Fortran to read those files and compile this Fortran extension using F2PY. Now that it seems that no possible combinations of Fortran/C compilers actually *work* with Python 2.4 on Windows XP, I was trying to translate the Fortran subroutine to Python. Basically, what I do (in Fortran, I hope to explain the code clearly) is: ! Declare an integer integer number ! Declare a 4-chars character character*4 keytype ! Declare a 8-chars character character*8 keyword ! feof is not very important here logical feof feof = .false. ! Open the file as unformatted big-endian open(unit = , file = filename, form = 'UNFORMATTED', convert = 'BIG_ENDIAN') ! loop until you find a particular keyword ! here "end=10" means that if the routine finds the EOF, it should go to ! the label "10 continue". "err=8" means that, if an error occours in reading the file, ! it should go to the label "8 continue" and continue reading the file do while(.not.feof) ! Read the 3 variables keyword, number and keytype read(1, end=10, err=8) keyword, number, keytype ! If the keyword is 'DIMENS', break the loop and go to the end if (keyword == 'DIMENS') then read(1, end=10, err=8) dimens goto 10 endif 8 continue enddo 10continue ! Close the file close(1) Well, does anyone have some suggestion about which kind of material/tutorial on similar things I should read? How can I deal in Python with variables that must be 8-chars or 4-chars in order to read correctly the file? Am I missing something else? Thank you very much for every suggestion. Andrea. -- "Imagination Is The Only Weapon In The War Against Reality." http://xoomer.virgilio.it/infinity77/ -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
John Machin wrote: > If you want to distribute obfuscated code, consider writing it in perl > :-) LOL That's really strong protection. Machine code is too easy to reverse engineer. :) Regards, Rob -- http://mail.python.org/mailman/listinfo/python-list
Read a file with open command
I can access to a file with the command:
file_obj = open ( " D:\My documents\Textfile.txt",'r')
When I now try to read a file with the following command:
file_obj = open ("D:\My documents\File.ods",'r') it doesn't function.
The extension ods is coming from OpenOffice.org Calc.
Why ?
jean-jeanot
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Re: using python to edit a word file?
John, I have a notion about translating stuff in a mess and could help you with the translation. But it may be that the conversion from DOC to formatted test is a bigger problem. Loading the files into Word and saving them in a different format may not be a practical option if you have many file to do. Googling for batch converters DOC to RTF I couldn't find anything. If you can solve the conversion problem, pass me a sample file. I'll solve the translation problem for you. Frederic - Original Message - From: "John Salerno" <[EMAIL PROTECTED]> Newsgroups: comp.lang.python To: Sent: Thursday, August 10, 2006 9:08 PM Subject: Re: using python to edit a word file? > John Salerno wrote: > > > But if I save the file to text, won't it lose its formatting? > > It looks like I can save it as an XML file and it will retain all the > formatting. Now I just need to decipher where the dates are in all that > mess and replace them, just using a normal text file! :) > -- > http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Python script setup
2Good4You-Veki(Cro) wrote: > Hi all, > > When I want setup my script: > > I write: > > from distutils.core import setup > setup(name="myscript", > version='1.0', > scripts=["myscripts.py"]) > > or some else example,error is > > > Traceback (most recent call last): > File "", line 1, in -toplevel- Do you get the same result if you put those Python statements in a file (typically named setup.py) and run it in the Windows "Command Prompt" window as shown in the manual: http://docs.python.org/inst/standard-install.html instead of using pyshell? Where/how are you supplying the "install" argument when using pyshell? > setup(name="myscript", > version='1.0', > scripts=["myscripts.py"]) > File "C:\Python24\distutils\core.py", line 101, in setup My distutils is where I'd expect it to be (C:\Python24\Lib\distutils) because that's where the standard Python installation puts it relative to my choice of the Python installation directory (C:\Python24). How did yours end up like that? Did you download distutils and install it as a separate package? If so, how did you install it? What version of Python are you using? > _setup_distribution = dist = klass(attrs) > File "C:\Python24\distutils\dist.py", line 130, in __init__ > setattr(self, method_name, getattr(self.metadata, method_name)) > AttributeError: DistributionMetadata instance has no attribute > 'get___doc__' HTH, John -- http://mail.python.org/mailman/listinfo/python-list
Re: Read a file with open command
Hi,
simply use file_obj = open ("D:\My documents\File.ods",'rb') for
opening file in binary access mode, which is required for binary files
on MS Windows.
Honza
jean-jeanot wrote:
> I can access to a file with the command:
> file_obj = open ( " D:\My documents\Textfile.txt",'r')
>
> When I now try to read a file with the following command:
>
> file_obj = open ("D:\My documents\File.ods",'r') it doesn't function.
> The extension ods is coming from OpenOffice.org Calc.
>
> Why ?
>
> jean-jeanot
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Python checking for None/Null values
Okay, I have been handed a python project and working through it I have had to add a report. I am returning 10 variables the results of an SQL Query and as usual the number of results vary from 1 result to 10 results so I implemented a check to see if the array item was empty or not. The code is below based upon the code already in the python project i was handed. history8=historyRep[8] if history8!=None: history8=cmi.format_history(historyRep[8]) else: history8='' and if historyRep[8]!=None: history8=cmi.format_history(historyRep[8]) else: history8='' but regardless i am getting the error below and i can't seen to resolve this, what am i doing wrong? Traceback (most recent call last): File "/home/phillipsd/work/medusa-new/htdocs/pricingrep.cgi", line 326, in ? if historyRep[8]==None: IndexError: list index out of range David P -- http://mail.python.org/mailman/listinfo/python-list
Re: Reading unformatted big-endian files
Andrea Gavana wrote:
> "err=8" means that, if an error occours in
> reading the file,
> it should go to the label "8 continue" and continue reading the file
Silently ignoring errors when reading a file doesn't sound like a good
idea to me at all, especially if different records have different
formats.
>
> Well, does anyone have some suggestion about which kind of
> material/tutorial on similar things I should read? How can I deal in
> Python with variables that must be 8-chars or 4-chars in order to read
> correctly the file?
(a) read the docs on the struct module
(b) eyeball this rough untested translation:
8<---
def filereader(filename):
import struct
f = open(fname, 'rb') # 'rb' is read binary, very similar to C
stdio
fmt = '>8si4s'
# Assuming unformatted means binary,
# and integer means integer*4, which is signed.
# Also assuming that the 3-variable records are fixed-length.
fmtsz = struct.calcsize(fmt)
while True:
buff = f.read(fmtsz)
if not buff: # EOF
break
keyword, number, keytype = struct.unpack(fmt)
keyword = keyword.rstrip() # remove trailing spaces
keytype = keytype.rstrip()
if keyword == 'DIMENS':
# 'dimens' is neither declared nor initialised in the
FORTRAN
# so I'm just guessing here ...
buff2 = f.read(4)
dimens = struct.unpack('>i', buff2)
break
print keyword, number, keytype # or whatever
# reached end of file (dimens *NOT* defined),
# or gave up (dimens should have a value)
f.close() # not absolutely necessary especially when only reading
if __name__ == "__main__":
import sys
filereader(sys.argv[1])
8<---
If this doesn't work, and it's not obvious how to fix it, it might be a
good idea when you ask again if you were to supply a
FORTRAN-independent layout of the file, and/or a dump of a short test
file that includes the DIMENS/dimens caper -- you can get such a dump
readily with the *x od command or failing that, use Python:
#>>>repr(open('thetestfile', 'rb').read(100)) # yes, I said *short*
HTH,
John
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Re: Python checking for None/Null values
In <[EMAIL PROTECTED]>, Fuzzydave wrote: > but regardless i am getting the error below and i can't seen to resolve > this, what am i > doing wrong? > > Traceback (most recent call last): File > "/home/phillipsd/work/medusa-new/htdocs/pricingrep.cgi", line 326, in ? > if historyRep[8]==None: IndexError: list index out of range `historyRep` seems to be shorter than you think it is. Try printing it too see what it actually contains. Ciao, Marc 'BlackJack' Rintsch -- http://mail.python.org/mailman/listinfo/python-list
Reading unformatted big-endian files
Hello John, >Silently ignoring errors when reading a file doesn't sound like a good >idea to me at all, especially if different records have different >formats. Yeah, you're right, but the file itself is quite big and I am interested only in a small part of it. Moreover, the sequence keyword-number-keytype is unlikely to fail to be read unless the simulator that outputs the file does something very strange. > (a) read the docs on the struct module Yes, I have done it, and I have written something similar to what you propose (well, actually your solution is more elegant than mine :-D ) >if keyword == 'DIMENS': ># 'dimens' is neither declared nor initialised in the FORTRAN ># so I'm just guessing here ... Sorry, I forgot to include it, 'dimens' is an integer(4) Thank you very much for your explanation, now it is very clear what I should do. I hope performances will not change so much: fortran is very fast in reading files (but I use it only in this case, I love to use Python)... well, let's see :-D Andrea. -- "Imagination Is The Only Weapon In The War Against Reality." http://xoomer.virgilio.it/infinity77/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Read a file with open command
jean-jeanot wrote:
> I can access to a file with the command:
> file_obj = open ( " D:\My documents\Textfile.txt",'r')
With a space before the drive letter? I don't think so.
When asking questions, *don't* type what you thought you used,
copy/paste what you actually used.
>
> When I now try to read a file with the following command:
>
> file_obj = open ("D:\My documents\File.ods",'r') it doesn't function.
> The extension ods is coming from OpenOffice.org Calc.
>
> Why ?
You haven't told us what "it doesn't function" means, so we'll have to
play guessing games ...could be for at least two possible reasons:
(1) .ods files are binary and you didn't specify 'rb'
(2) you really typed "d:\my documents\file.ods" and the \f got
interpreted as a form-feed character. You should *never* type literal
Windows filenames like that. Instead, you have three choices:
(a) "d:\\my documents\\file.ods" # not recommended
(b) r"d:\my documents\file.ods"
(c) "d:/my documents/file.ods"
I'd suggest that you fix *both* of the above problems and try again.
HTH,
John
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Re: Python checking for None/Null values
> `historyRep` seems to be shorter than you think it is. Try printing it > too see what it actually contains. > > Ciao, > Marc 'BlackJack' Rintsch HistoryRep is an array value so historyRep[0] to [7] all have values in them but historyRep[8] and [9] do not as the query does not always return a full 10 values. I am trying to check all of the historyRep items to check if they are empty/null/None (whatever the term is in python) and make it return an empty value or a none to the screen. I did print historyRep[8] out and it falls over, I am assuming if its an array and if the SQL query only returns 8 records instead of 10 then the last two array values i am checking for litterly don't exist instead of being null but i can't find a if exists style function either? David P -- http://mail.python.org/mailman/listinfo/python-list
Re: easy string formating question
On Thu, 10 Aug 2006 17:28:59 -0700 Simon Forman <[EMAIL PROTECTED]> wrote: #> There is a better way to check for exhausted StringIO (Note that #> "input" is a python built-in and should not be used for a variable #> name): Right, thanks for pointing it out. #> import StringIO #> s = '1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' #> size = 10 # 100 #> S = StringIO.StringIO(s) #> #> data = S.read(size) #> while data: #> print data + "?\n", #> data = S.read(size) It may be only my personal opinion, but duplicating data = S.read(size) line doesn't strike me as particularly better. #> However, it's considered more "pythonic" to do it like so (also uses a #> StringIO as an output "file" to show how print can print to a file-like #> object): #> #> import StringIO #> #> s = '1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' #> size = 10 # 100 #> #> S = StringIO.StringIO(s) #> out = StringIO.StringIO()# stand-in for a real file. #> #> while True: #> data = S.read(size) #> if not data: #> break #> print >> out, data + "?\n", #> #> print out.getvalue() This looks slightly nicer, but still, I wish there was some kind of StringIO.isEOF() to put in while condition. Don't take me wrong, I love "while True" stuff, but sometimes having an actual test there can be nice :) -- Best wishes, Slawomir Nowaczyk ( [EMAIL PROTECTED] ) Beware of bugs in the above code; I have only proved it correct, not tried it. -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
On Thu, 10 Aug 2006 17:35:27 -0700 enigmadude <[EMAIL PROTECTED]> wrote: #> 2. I've never done this, but you might be able to encrypt or otherwise #> turn you modules into binary form, and then use a clever import #> hook. Please observe that whatever the "clever import hook" is, it actually needs to know the way to *decrypt* the module (secret key or whatever). It means that if somebody decompiles the importing code, he can just as well decompile the "hidden" one. -- Best wishes, Slawomir Nowaczyk ( [EMAIL PROTECTED] ) Children are natural mimics, who act like their parents despite every effort to teach them good manners. -- http://mail.python.org/mailman/listinfo/python-list
Re: converting a nested try/except statement into try/except/else
On Thu, 10 Aug 2006 16:42:47 -0700 Simon Forman <[EMAIL PROTECTED]> wrote: #> 6.) There's a single return statement. #> #> I forget now where I picked this up, but it's served me well for #> many years: Procedures, functions, methods, etc... should have one #> exit point. Something about having fewer "code paths" to test or #> something. Number of return statements has absolutely *nothing* to do with number of code paths to test. -- Best wishes, Slawomir Nowaczyk ( [EMAIL PROTECTED] ) Only drug dealers and software companies call their customers 'users.' -- http://mail.python.org/mailman/listinfo/python-list
Re: Nested function scope problem
On Wed, 09 Aug 2006 15:11:16 -0300
Gerhard Fiedler <[EMAIL PROTECTED]> wrote:
#> On 2006-08-09 07:54:21, Slawomir Nowaczyk wrote:
#>
#> > Nope. Equivalence table can look like this:
#> >
#> >Python C
#> > variable:a variable: a
#> > textual representation: "a" address operator: &a
#> > id of object: id(a) dereference operator: *a
#> >
#> > Also, notice, that "id(a)" does not really "identify" a variable. It
#> > only identifies *object* which is bound to this variable. Both in
#> > Python and in C.
#>
#> Rests one question: what is the value of the variable? In Python, it would
#> be the result of "a". In C, it would be the result of ...?
Hmmm, well, it should be value of a, but it clearly doesn't make much
sense. It seems like I got confused and was saying something else than
I was thinking.
So, indeed, you were right: this analogy is broken.
But let me try again, please (just one more time, if this doesn't work
either I am willing to admit I do not see a simple analogy between
Python and C variables :-)
Python C
variable: avariable: a
value of variable: eval("a")dereference operator: *a
textual representation: "a" address operator: &a
id of object: id(a)value of variable: a
Thus, equivalent operations would be:
Python C
a = 1003 a = &three // (1)
id(a)a
b = 1004 b = &four
a == b # False *a == *b// false
id(a) == id(b) # False a == b // false
b = ab = a
a == b # True *a == *b// true
id(a) == id(b) # True a == b // true
a = 1001+1002a = MallocNewIntFromValue( one+two )
a == b # True *a == *b// true
id(a) == id(b) # False / True (2) a == b // false / true
a = 1003+1004a = MallocNewIntFromValue( three+four )
a == b # False *a == *b// false
id(a) == id(b) # False a == b // false
(1) one, two, three and four are constants, something like "const int
one = 1". That is because there is no "literal int object" in C
- the thing you would write as "1" is likely not to actually
exist at runtime. And you cannot take an address of it.
(2) is actually True in CPython implementation for small integers, but
that's a minor detail. MallocNewIntFromValue might cache objects
as well.
--
Best wishes,
Slawomir Nowaczyk
( [EMAIL PROTECTED] )
Housework can't kill you... but why take a chance?
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Re: Python checking for None/Null values
> Check with "if history8 is not None". Won't help your problem, but it > is a bit more pythonic code ;-) > > Sybren Actually i tried that as well when i was fooling around, atm i am less concenred with pythonic code and making it work in the first place. The entire program to be fair is a bit messy but i do agree on the basis that the easier the code is to read the easier it is to work with. David P -- http://mail.python.org/mailman/listinfo/python-list
Rendering Vector Graphics
Hi ppl, I've already posted this message through the mailing-list, but it seems it never arrived here. Strange... Anyway: I need to render high-quality vector graphics with Python. I was thinking of something like 'cairo', though I need to run under win32 and can't find a pycairo package for it. Suggestions? Thanks, Hugo Ferreira -- http://mail.python.org/mailman/listinfo/python-list
Re: Rendering Vector Graphics
> I need to render high-quality vector graphics with Python. I was > thinking of something like 'cairo', though I need to run under win32 > and can't find a pycairo package for it. Suggestions? I've had good experiences doing simple 3d vector stuff with Pygame. It's wraps SDL so it has pretty nice capabilities. -- http://mail.python.org/mailman/listinfo/python-list
Re: Reading unformatted big-endian files
On 11/08/2006 8:35 PM, Andrea Gavana wrote: > I hope performances will not change so much: fortran is > very fast in reading files (but I use it only in this case, I love to > use Python)... well, let's see :-D Well FORTRAN would have to have *something* going for it :-) I vaguely recall in a previous incarnation tarting up a vanilla ratfor "compiler" with switch statements and macros and all sorts of goodies so that life was less unbearable :-) [this was *before* f77] Suggestions: (1) Upgrade to 2.5 as soon as it goes final -- struct's performance has been improved. (2) Consider the possibility of not unpacking all three variables if you don't need to -- for example if you are ignoring everything until you hit a record that starts with 'DIMENS ', you don't need to unpack anything, just do: if buff[:8] == 'DIMENS ': How big are your files, anyway? Cheers, John -- http://mail.python.org/mailman/listinfo/python-list
Re: Python checking for None/Null values
Fuzzydave: > I am trying to check all of the historyRep items > to check if they are empty/null/None (whatever the term is in python) An item can't be empty in Python,and null doesn't exist, it can be the object None. But probly that's not your case. > I did print > historyRep[8] out and it falls over, I am assuming if its an array and > if the SQL query only returns 8 records instead of 10 then the last > two array values i am checking for litterly don't exist instead of > being null but i can't find a if exists style function either? A way to solve your problem is to see how many elements the list contains with len(sequence) then act accordingly with the elements that exist. Even better is to work on the elements that exist, with something like: for element in sequence: do_stuff Note: sometimes having a clean and readable program is better than having a running program that you can't read, because you can fix the the first one, and it can teach you something. Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: Python checking for None/Null values
> Note: sometimes having a clean and readable program is better than > having a running program that you can't read, because you can fix the > the first one, and it can teach you something. > > Bye, > bearophile Thanks for your help and suggestions i'll give them a shot. Unfortunatly when working with 6 years of other peoples legacy code (esspecially *this* code) it sometimes looks like it was specifiyed in the project spec *not* to be readable :) But I will endevour to change that while working with it myself ;) David P -- http://mail.python.org/mailman/listinfo/python-list
Re: Python checking for None/Null values
Fuzzydave wrote: > > HistoryRep is an array value so historyRep[0] to [7] all have values > in them but historyRep[8] and [9] do not as the query does not always > return a full 10 values. I am trying to check all of the historyRep > items > to check if they are empty/null/None (whatever the term is in python) > and make it return an empty value or a none to the screen. I did print > historyRep[8] out and it falls over, I am assuming if its an array and > if the SQL query only returns 8 records instead of 10 then the last > two array values i am checking for litterly don't exist instead of > being > null but i can't find a if exists style function either? Just paste this in immediately after getting the result back from the query; it's not necessarily the fastest way but it's effin' obvious what it's doing :-) while len(historyRep) < 10: historyRep.append(None) Cheers, John -- http://mail.python.org/mailman/listinfo/python-list
Re: Python checking for None/Null values
Fuzzydave wrote: > Okay, I have been handed a python project and working through it I have > had to add a report. I am returning 10 variables the results of an SQL > Query and as usual the number of results vary from 1 result to 10 results > so I implemented a check to see if the array item was empty or not. The > code is below based upon the code already in the python project i was > handed. In Python list items do not magically spring into existence if you ask for them. Therefore items[index] raises an IndexError if index is >= len(items). A possible resolution is to check the length of historyRep first: if len(historyRep) > 8 and historyRep[8] is not None: history8 = cmi.format_history(historyRep[8]) else: history8 = "" Note that names like history8 are a strong indication that you should use a list rather than individual variables, e. g: history = [] for item in historyRep: if item is None: s = "" else: s = cmi.format_history(item) history.append(s) or maybe even history = [cmi.format_history(item) for item in historyRep] if historyRep doesn't contain any None values. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Rendering Vector Graphics
Hi! [EMAIL PROTECTED] wrote: > > I need to render high-quality vector graphics with Python. I was > > thinking of something like 'cairo', though I need to run under win32 > > and can't find a pycairo package for it. Suggestions? > > I've had good experiences doing simple 3d vector stuff with Pygame. > It's wraps SDL so it has pretty nice capabilities. What about 2D? I won't be doing any 3d stuff, though I need high-quality 2D, and complex stuff like defining clipping regions with bezier curves and filling with gradients. Thanks! Hugo Ferreira -- http://mail.python.org/mailman/listinfo/python-list
Re: Component framework
Jan Svec wrote: > Hi all, > some time ago I've seen an interesting component framework for Python > but I don't remember the name. I remember only one example. There were > two components: Wheel and Car, Wheel were then inserted four times into > Car and so on. This framework has had lazy instantiation of child > components. > > Does anybody know the name of this framework? PEAK - http://peak.telecommunity.com/Articles/WhatisPEAK.html """PEAK is the "Python Enterprise Application Kit". If you develop "enterprise" applications with Python, or indeed almost any sort of application with Python, PEAK may help you do it faster, easier, on a larger scale, and with fewer defects than ever before. The key is component-based development, on a reliable infrastructure.""" FWIW, I don't use it, but I'm aware of it. I use a component framework I develop for work & fun called Kamaelia - but PEAK is what you're thinking of. BTW, since it might be helpful, from your request I punched the following search terms into google - which links to the tutorial mentioning cars and wheels: * Search terms: wheel car component lazy python :-) Best Regards, Michael. -- Michael Sparks, Kamaelia Project Lead http://kamaelia.sourceforge.net/Home http://yeoldeclue.com/blog -- http://mail.python.org/mailman/listinfo/python-list
Make $1000's Monthly!
Make $1000's Monthly! Over 600 work at home firms are in need of survey takers, product assemblers, home mailers, mystery shopping Data entry and more! Report contains complete contact details for over 650 companies now hiring! For this complete report of over 600 firms please visit http://www.typeinternational.com/idevaffiliate/idevaffiliate.php?id=6589_52_3_87 -- http://mail.python.org/mailman/listinfo/python-list
Re: Rendering Vector Graphics
Bytter wrote: > Hi ppl, > I've already posted this message through the mailing-list, but it seems > it never arrived here. Strange... Anyway: > I need to render high-quality vector graphics with Python. I was > thinking of something like 'cairo', though I need to run under win32 > and can't find a pycairo package for it. Suggestions? AGG (Anti-Grain Geometry) is one such engine that a couple of people have interfaced to Python. http://www.antigrain.com/ ... jay graves -- http://mail.python.org/mailman/listinfo/python-list
Re: Rendering Vector Graphics
Bytter wrote: > Hi ppl, > > I've already posted this message through the mailing-list, but it seems > it never arrived here. Strange... Anyway: > > I need to render high-quality vector graphics with Python. I was > thinking of something like 'cairo', though I need to run under win32 > and can't find a pycairo package for it. Suggestions? > > Thanks, > > Hugo Ferreira Hi, You can use cairo through the pyGTK bindings. Works pretty well for me. Cheers, Yannick -- http://mail.python.org/mailman/listinfo/python-list
Re: timeout calling local sendmail
That seems applicable to writing an SMTP server/daemon, but is it necessary for a script client calling a local SendMail daemon? Tim Williams wrote: > > > RFC 1123 > > http://www.freesoft.org/CIE/RFC/1123/109.htm > > I find that a timeout of 120 seconds is the bare minimum. If the > timeout is too short you get a condition where the email is received > succesfully but appears to the sending server to have failed and a > retry may occur - so the recipient gets multiple copies. > > HTH :) -- http://mail.python.org/mailman/listinfo/python-list
Reading unformatted big-endian files
Hello John, > (1) Upgrade to 2.5 as soon as it goes final -- struct's performance has > been improved. I would love to, but I have some dependencies (like wxPython, Numeric, py2exe and so on) for which a 2.5 stable release either doesn't exist or is not fully tested or will break my app in some way. I believe Numeric doesn't exist anymore (!) and I am somewhat afraid to use numpy. It is a little bit more "hostile" :-D > How big are your files, anyway? Well, they ranges from 6-7 MB (the smallest) to 600-700 MB (the biggest)... I will try the new script and see how it performs. Thank you very much! Andrea. -- "Imagination Is The Only Weapon In The War Against Reality." http://xoomer.virgilio.it/infinity77/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Generator-based microthreads and games
[EMAIL PROTECTED] wrote:
> I've seen various generator-based microthread implementations online,
> but I've been wondering: has anyone used microthreads in this manner in
> a game environment? Note, I am emphatically *not* referring to
> Stackless, which I know has been used in a production game environment;
> this post is referring strictly to the standard Python interpreter, (v.
> 2.4 or 2.5 as you wish).
>
> I intend to try a little cooperative microthreading implementation in
> my game server to avoid threading issues and possibly simplify the
> programming model. This seems particularly attractive given the
> enhancements Python 2.5 brings to generators.
>
> If anyone else has tried this, what I would like to know is this:
Several. I'll largely talk about our experience with Kamaelia below, but
there's also LGT which is also pretty interesting.
LGT: http://www.pygame.org/projects/9/20/
Kamaelia:
The reason I'll only talk about Kamaelia is because I'm the lead developer
on that project, and because I think it's a fun way to write this sort of
thing :-)
Naturally I'm biassed, bear that in mind :-)
> * How many microthreads were you able to run concurrently with decent
> performance?
Numbered in the thousands. It's been a while since we've done any benchmarks
however. (Most of our use of generators has revolved around network
systems, but we use Pygame fairly heavily)
> * How much computation is feasible to carry out in a microthread?
> (Certainly, this goes hand in hand with the previous question, of
> course.)
As much as you like, however the more you do, the less microthreads you can
run (as you say, this goes hand in hand).
For short examples of what we're using generators for, take a peek here:
* http://kamaelia.sourceforge.net/Cookbook.html
> * What sort of scheduler did you use?
We use a simple round robin scheduler.
> * Was it worth it? By "worth it," I mean in terms of performance and
> ease of implementation.
Absolutely. There's a knock on of python style generators that people don't
tend to realise: it forces a your generators to be simple and focussed.
Given we augment generators with inboxes & outboxes for communications we
find we get higher levels of reuse of many components than we would
normally expect. We embed the generator in a class, giving far more
flexible communications that python 2.5's newly added facilities (this
approach works happily with python 2.2 onwards, meaning we've versions of
Kamaelia that even run on nokia phones.)
The only game we've written in Kamaelia at present is a simple bouncing cats
game (aimed at 2-4 year olds :-), which adds bouncing cats, and removes
them to a noise. However the only slow down I've really seen with that is
more due to the speed at which pygame & SDL can update the display AFAICT.
> I'll no doubt have further questions later after I actually begin
> implementing this stuff, but I suppose that will do for now.
Even if you're not interested in Kamaelia (then again you might - we find it
incredibly useful), you may find our tutorial useful - it shows you how to
go about building a simple scheduler and simple systems of communicating
generators in easy simple steps. (Tested on over a dozen novice python
programmers now).
* http://kamaelia.sourceforge.net/MiniAxon/
Systems we're using this for:
* Collaborative whiteboarding (every client is also a server) including
audio
* Transcoding PVR for making a record of transmission of all BBC TV
channels, including collection of EPG data.
* Under development - video annotation/editing. (for allowing
collaborative discussion of how to post process video)
I suppose knocking up a simple game might be a nice thing to do as well :-)
For what it's worth, a focus in Kamaelia is on making it harder to do dumb
things when doing things in parallel - as you are doing when using threads
or generators. (That's the reason for the inbox/outbox metaphor - take it
out an inbox, it's yours to do what you want, put it in an outbox, you're
not allowed to do anything with it any more).
As a result generator based components and thread based components can be
mixed quite happily in Kamaelia, since you have explicit data handoff. This
might not seem immediately important to you, but as a system grows, you
need a way of handing blocking calls (since otherwise your generators and
scheduler stall), and putting those in a thread is a common idea. Doing
this safely is normally somewhat more complex than: (including imports)
import Axon
from Kamaelia.Chassis.Pipeline import pipeline
from Kamaelia.Util.Console import ConsoleEchoer
class ConsoleReader(Axon.ThreadedComponent.threadedcomponent):
def main(self):
while 1:
data = raw_input(">>> ") # block waiting for user
self.send(data, "outbox") # send on to next thing
pipeline(
ConsoleReader(), # Threaded Component
ConsoleEchoer(), # Generator Component
).run()
Just as an indication of
Adding private tags to a tiff file.
Hi there,
I'm manipualating tiff images captured by a program that insists on
using annoying private tags. I want to be able to import an image that
I have created into the program but I cannot get PIL to save the
private tag. Here is a simplified version of the code I am using:
import Image
original = Image.open(r"test.tif")
original.tag[34118] = "life"
print "Before saving" , original.tag[34118]
original.save("test2.tif")
altered = Image.open(r"test2.tif")
if altered.tag.tagdata.has_key(34118):
print "It worked!"
Is there a way of getting this to work? I have tried looking at
TiffTags and TiffImageFile, but I cannot understand why the tags are
not preserved. Or should I be looking at a different library?
Many thanks.
--
http://mail.python.org/mailman/listinfo/python-list
schedule at specific hours
Hi there, I have a daemon running 24/7, and I want that it executes a certain function several times a day, as specified in an configfile (e.g. actiontimes=10:00,12:00,19:00) Do I have to fiddle with sched.scheduler and calc. time differences to schedule my events, or is there another (nicer...) way? Regards, Yves -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
Cameron Laird wrote: > Steven D'Aprano wrote: > >Hiding source code is incompatible with Open Source software. You can hide > >code, or be Open Source, but not both. [...] > I also disagree with your characterization of Open Source. I don't know which part of the open source movement would tolerate the hiding of source code whilst simultaneously calling the resulting software "open source", but I'd imagine they'd have a hard time justifying their "open source" label. Of course, it is possible to be the "First Iranian Open Source Community" in terms of consuming open source software rather than producing it, so perhaps that's what the questioner intended to communicate in their signature. [...] > Myself, I just marvel at the different worlds in which we live. *My* > experience has to do with how tough it is to deploy and maintain > correct, working stuff, even with teams of seasoned pros. The thought > that users will routinely reverse-engineer our applications, and ... > well, I marvel. I've previously mentioned a very interesting paper which not only described the reverse engineering of the Skype protocol and software but also described how to make interoperating Skype clients. Given that the well-financed developers spent a lot of time introducing various protection measures (encryption, verification, etc.) and yet someone can write the aforementioned stuff up in a paper, I'd recommend an upgrade to any business plan which relies on obfuscation to prevent "unauthorised" use or modification. Indeed, I'd recommend that any such entrepreneur think twice about starting a traditional proprietary software business in this day and age. Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
Bayazee wrote: > hi > can we hide a python code ? > if i want to write a commercial software can i hide my source code from > users access ? > we can conver it to pyc but this file can decompiled ... so ...!! > do you have any idea about this ...? > > --- > First Iranian Open Source Community : www.python.ir You can distribute the compiled byte-code files (*.pyc) which are harder to turn back into source code. There was a product called decompyle which could do it, but although there is a version floating around which works for Python 2.4 I've never heard of anyone getting it to work. Import hooks and encrypted source are a good option. Py2exe embeds the byte-code file for your main script into the executable which is also pretty good. All of these make it hard enough to deter most people who will ever want to abuse your source code. Until you have *lots* of users this is probably enough. I never understand the knee-jerk reaction on this mailing list to answer people who ask this question by telling them they don't really want to do it... Fuzzyman http://www.voidspace.org.uk/python/index.shtml -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
Paul Boddie wrote: [snip..] > I've previously mentioned a very interesting paper which not only > described the reverse engineering of the Skype protocol and software > but also described how to make interoperating Skype clients. Given that > the well-financed developers spent a lot of time introducing various > protection measures (encryption, verification, etc.) and yet someone > can write the aforementioned stuff up in a paper, I'd recommend an > upgrade to any business plan which relies on obfuscation to prevent > "unauthorised" use or modification. Indeed, I'd recommend that any such > entrepreneur think twice about starting a traditional proprietary > software business in this day and age. > How many users did skype have before that happened... Several orders of magnitude above what is required to earn a living from selling a few programs I suspect. Fuzzyman http://www.voidspace.org.uk/python/index.shtml > Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
Fuzzyman wrote: > Bayazee wrote: > > can we hide a python code ? > > if i want to write a commercial software can i hide my source code from > > users access ? > > we can conver it to pyc but this file can decompiled ... so ...!! [...] > You can distribute the compiled byte-code files (*.pyc) which are > harder to turn back into source code. As the man said, and I've seen various proprietary software companies do just that. > There was a product called decompyle which could do it, but although > there is a version floating around which works for Python 2.4 I've > never heard of anyone getting it to work. I've got decompyle to work in the recent past (about a year or so ago) - the trick was to find the Debian package and to make some minor adjustments to the code to work with whatever breakage the 2.3 -> 2.4 upgrade caused. [...] > I never understand the knee-jerk reaction on this mailing list to > answer people who ask this question by telling them they don't really > want to do it... Well, given the pace of technological development and the disregard in some environments for perpetual backward compatibility, how much of your infrastructure would you implement in vendor-supplied binaries, especially when the vendor is a one man plus dog operation? When the binaries don't work on your newly-upgraded system and the vendor is on holiday (possibly for good), it doesn't look like a knee-jerk reaction any more. Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
>> can we hide a python code ? >> if i want to write a commercial software can i hide my source code from >> users access ? >> we can conver it to pyc but this file can decompiled ... so ...!! > > All of these make it hard enough to deter most people who will ever > want to abuse your source code. Until you have *lots* of users this is > probably enough. > > I never understand the knee-jerk reaction on this mailing list to > answer people who ask this question by telling them they don't really > want to do it... I think the reaction is based mostly in reality...an honest answer: If you give people the program, then you also give them the ability to reverse engineer it. It's as simple as that. No matter how dongled, obfuscated, compiled, encrypted, etc. At some point the code actually has to be executed/interpreted, and at that point, it can be intercepted. Thus, "by telling them that they don't really want to do it", the list is conveying the futility of attempting to strive for the goal. Obfuscation may be a shallow speedbump, and for some folks, better than nothing. However, it's better to have a good relationship with your customers and know that they will adhere to licensing conditions, rather than to try and strong-arm them into behaving a particular way. My "%s%0.2f" % (currency_marker, 0.02) on the matter. :) -tkc -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
Paul Boddie wrote: > Fuzzyman wrote: > > Bayazee wrote: > > > can we hide a python code ? > > > if i want to write a commercial software can i hide my source code from > > > users access ? > > > we can conver it to pyc but this file can decompiled ... so ...!! > > [...] > > > You can distribute the compiled byte-code files (*.pyc) which are > > harder to turn back into source code. > > As the man said, and I've seen various proprietary software companies > do just that. > > > There was a product called decompyle which could do it, but although > > there is a version floating around which works for Python 2.4 I've > > never heard of anyone getting it to work. > > I've got decompyle to work in the recent past (about a year or so ago) > - the trick was to find the Debian package and to make some minor > adjustments to the code to work with whatever breakage the 2.3 -> 2.4 > upgrade caused. > > [...] > > > I never understand the knee-jerk reaction on this mailing list to > > answer people who ask this question by telling them they don't really > > want to do it... > > Well, given the pace of technological development and the disregard in > some environments for perpetual backward compatibility, how much of > your infrastructure would you implement in vendor-supplied binaries, > especially when the vendor is a one man plus dog operation? When the > binaries don't work on your newly-upgraded system and the vendor is on > holiday (possibly for good), it doesn't look like a knee-jerk reaction > any more. > If you distribute applications with py2exe then your application is no longer dependent on the installed version of Python. The question keeps getting asked because a lot of new programmers are looking to create programs that they will sell. A lot of these will be good programmers, and some of the software will be successful. Telling them 'you can't do that with Python', does no good to Python itself. In fact what you can do with Python is not a lot worse than most other languages, and almost certainly *good enough* for this sort of thing. Fuzzyman http://www.voidspace.org.uk/python/index.shtml > Paul -- http://mail.python.org/mailman/listinfo/python-list
datetime to timestamp
Hi. How can I convert a python datetime to a timestamp? It's easy to convert a timestamp to datetime (datetime.datetime.fromtimestamp(), but the other way around...?) -Simen -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
Tim Chase wrote: > >> can we hide a python code ? > >> if i want to write a commercial software can i hide my source code from > >> users access ? > >> we can conver it to pyc but this file can decompiled ... so ...!! > > > > All of these make it hard enough to deter most people who will ever > > want to abuse your source code. Until you have *lots* of users this is > > probably enough. > > > > I never understand the knee-jerk reaction on this mailing list to > > answer people who ask this question by telling them they don't really > > want to do it... > > I think the reaction is based mostly in reality...an honest > answer: If you give people the program, then you also give them > the ability to reverse engineer it. It's as simple as that. > [snip..] But until your number of users gets beyond quite a high level, it's just extremely likely that any of your individual users will have that sort of ability - or anyone else will have the motivation to do it. What you can do with Python is almost certainly *good enough* for most people who ask this question - and that fact never seems to be included in the 'reality' propogated by the knee jerk reactionists... :-p Fuzzyman http://www.voidspace.org.uk/python/index.shtml -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
Fuzzyman wrote: > Paul Boddie wrote: [Skype paper] > > I'd recommend an > > upgrade to any business plan which relies on obfuscation to prevent > > "unauthorised" use or modification. Indeed, I'd recommend that any such > > entrepreneur think twice about starting a traditional proprietary > > software business in this day and age. > > How many users did skype have before that happened... > > Several orders of magnitude above what is required to earn a living > from selling a few programs I suspect. The point was that dreaming up exotic "protection" schemes for closed source software is quite possibly only the highest priority in either a highly traditional shrinkwrapped proprietary software business (where the evidence - my spam folder - suggests that the "protection" is only a marginally effective deterrent) or in some kind of proprietary software plus services business where you don't want people tampering with your infrastructure (where the evidence suggests that anyone determined enough will force you to continually focus on that "protection" scheme over the long-term). So, if the questioner just wants to sell a few programs, they might want to either consider different business models than those traditionally envisaged, or they might want to be aware that fancy "protection" is most likely to be a long-term investment yielding moderately disappointing results, and that their energy is best directed elsewhere. Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Python checking for None/Null values
> [EMAIL PROTECTED] wrote: > A way to solve your problem is to see how many elements the list > contains with > len(sequence) cheers after your post went of to try it and it worked first time thanks for being helpful and plesant :) Fuzzy -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
Tim Chase wrote: [snip] > However, it's better to have a good relationship with your > customers and know that they will adhere to licensing conditions, > rather than to try and strong-arm them into behaving a particular > way. > Don't forget that distributing your source code is more of a gift to your competitors (and potential competitors) than it is to your customers... Fuzzyman http://www.voidspace.org.uk/python/index.shtml > My "%s%0.2f" % (currency_marker, 0.02) on the matter. :) > > -tkc -- http://mail.python.org/mailman/listinfo/python-list
Unit Testing Python
I am looking for a GUI to put on top of my unit testing framework. I have found http://homepage.hispeed.ch/py430/python/unittestgui.py through google, I have been unable to get the copy results function to run I have downloaded the editor scite that it calls and still nothing has anyone been able to get this working. Or does anyone know of a GUI with greater functionality. Thanks a million :) -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
Fuzzyman wrote: > Paul Boddie wrote: > > Fuzzyman wrote: > > > > > I never understand the knee-jerk reaction on this mailing list to > > > answer people who ask this question by telling them they don't really > > > want to do it... Note your choice of words: "don't really want to do it". [...] > If you distribute applications with py2exe then your application is no > longer dependent on the installed version of Python. But there are numerous other things that might stop whatever binary it is from working over longer periods of time. Besides, py2exe executables don't exactly exhibit various typical benefits of normal Python programs such as being able to run on more than one platform, unless you recommend that everyone runs those applications in some kind of Windows virtualisation solution. > The question keeps getting asked because a lot of new programmers are > looking to create programs that they will sell. A lot of these will be > good programmers, and some of the software will be successful. Telling > them 'you can't do that with Python', does no good to Python itself. But many people admit that solutions do exist, notably py2exe and other tools which do very similar things but for more than one platform (and have done so for at least a decade). Now you did say that people are being made to feel that they "don't really want to do it", but that's a very different thing from being told that they "can't do that with Python". Personally, I'd rather people chose not to do such things with Python, for various reasons including the inability of the end-user to study or fix bugs in the code or to take advantage of various well-known benefits of the Python language, library and runtime. But I do admit that they at least can achieve some level of obfuscation or "protection" for such endeavours (and a suitably-phrased Web search will provide established solutions for doing just that). Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: datetime to timestamp
On 11/08/2006 11:10 PM, Simen Haugen wrote: > Hi. > > How can I convert a python datetime to a timestamp? It's easy to convert > a timestamp to datetime (datetime.datetime.fromtimestamp(), but the > other way around...?) > > -Simen > Is the timetuple() method what you want? #>>> import datetime #>>> n = datetime.datetime.now() #>>> n datetime.datetime(2006, 8, 11, 23, 32, 43, 109000) #>>> n.timetuple() (2006, 8, 11, 23, 32, 43, 4, 223, -1) Cheers, John -- http://mail.python.org/mailman/listinfo/python-list
Re: datetime to timestamp
On 11/08/2006 11:35 PM, John Machin wrote: > On 11/08/2006 11:10 PM, Simen Haugen wrote: >> Hi. >> >> How can I convert a python datetime to a timestamp? It's easy to convert >> a timestamp to datetime (datetime.datetime.fromtimestamp(), but the >> other way around...?) >> >> -Simen >> > > Is the timetuple() method what you want? > > #>>> import datetime > #>>> n = datetime.datetime.now() > #>>> n > datetime.datetime(2006, 8, 11, 23, 32, 43, 109000) > #>>> n.timetuple() > (2006, 8, 11, 23, 32, 43, 4, 223, -1) Aaaarrrggghhh no it's not what you want -- looks like you have to do the arithmetic yourself, starting with toordinal() -- http://mail.python.org/mailman/listinfo/python-list
Re: excel in unix?
"[EMAIL PROTECTED]" <[EMAIL PROTECTED]> writes: > [EMAIL PROTECTED] wrote: > > hi > > is it possible to create excel files using python in Unix env? > > if so, what module should i use? > > thanks > > Depending on the complexity of your data you might find the csv module > useful. It allows you to write comma separated value (.csv) files that > Excel reads just fine. > We use the csv module a lot. I've also investigated the old DIF and SLK formats for slightly more functoinality. But the coming standards-based world, if you need more than csv, start writing to to the OpenOffice.org formats, either with your own code or via PyUNO. Then use OOo itself or a MS-sponsored ODF reader to translate to Excel format. This should be a maintainable approach over time (but a lot more complex than just csv). -- Harry George PLM Engineering Architecture -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter module not found
Well, I finally solved my problem. I just had to reinstall python with the USE flags of tcl and tk. #USE="tcl tk" emerge python And now I can use Tkinter Thanks guys! -- http://mail.python.org/mailman/listinfo/python-list
Re: Rendering Vector Graphics
jay graves wrote: > Bytter wrote: >> Hi ppl, >> I've already posted this message through the mailing-list, but it seems >> it never arrived here. Strange... Anyway: >> I need to render high-quality vector graphics with Python. I was >> thinking of something like 'cairo', though I need to run under win32 >> and can't find a pycairo package for it. Suggestions? > > AGG (Anti-Grain Geometry) is one such engine that a couple of people > have interfaced to Python. > http://www.antigrain.com/ Here are a couple of AGG wrappers for Python: 1) Fredrik Lundh's aggdraw allows you to draw AGG graphics on top of PIL images. 2) You can also check out my dvpaint module. http://tachyon.in/davinci/ (It is a part of a larger vector graphics project which i hope to work on sometime in the future.) [sreeram;] signature.asc Description: OpenPGP digital signature -- http://mail.python.org/mailman/listinfo/python-list
Re: Nested function scope problem
On 2006-08-11 07:48:33, Slawomir Nowaczyk wrote:
> But let me try again, please (just one more time, if this doesn't work
> either I am willing to admit I do not see a simple analogy between
> Python and C variables :-)
>
>Python C
> variable: avariable: a
> value of variable: eval("a")dereference operator: *a
> textual representation: "a" address operator: &a
> id of object: id(a)value of variable: a
>
> Thus, equivalent operations would be:
>
>Python C
> a = 1003 a = &three // (1)
> id(a)a
> b = 1004 b = &four
> a == b # False *a == *b// false
> id(a) == id(b) # False a == b // false
> b = ab = a
> a == b # True *a == *b// true
> id(a) == id(b) # True a == b // true
> a = 1001+1002a = MallocNewIntFromValue( one+two )
> a == b # True *a == *b// true
Probably not True; b refers to the 1003 object, a refers to the 2003
object. But that's just a minor "bug" in your selection of values :) Your
intention was probably to make a = 1001+2 in the line above.
> id(a) == id(b) # False / True (2) a == b // false / true
> a = 1003+1004a = MallocNewIntFromValue( three+four )
> a == b # False *a == *b// false
> id(a) == id(b) # False a == b // false
>
> (1) one, two, three and four are constants, something like "const int
> one = 1". That is because there is no "literal int object" in C
> - the thing you would write as "1" is likely not to actually
> exist at runtime. And you cannot take an address of it.
>
> (2) is actually True in CPython implementation for small integers, but
> that's a minor detail. MallocNewIntFromValue might cache objects
> as well.
I don't have a problem with that analogy. I guess we also agree that it has
its limits (as all analogies have). However, with this analogy, a and b
/must/ be pointer variables in C; the analogy does not work if a and b are
not pointers.
Which brings me back to my earlier statement: if it is at all possible to
create a useful analogy between Python variables and C variables, it is
between Python variables and C /pointers/. There is still no useful analogy
between Python variables and general C variables (i.e. non-pointer
variables). Note that non-pointer variables can contain objects, not only
simple types. But they still are not analog.
Gerhard
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some n00b question
I'm learning how to program python. a few questions a) I'm mostly interested in creating exe's that have to do with music -- things to help me keep track of chord progressions, transpositions, etc. can anyone point me in the direction of resources on this? b) I'm also interested in created GUI's sooner rather than later. Can anyone point me to a fast track to doing GUI's on python? thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: Native Win32 text entry dialog?
Well, to answer my own question http://www.averdevelopment.com/python/EasyDialogs.html Thanks to all who responded! ;-P -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
John Machin wrote: > Bayazee wrote: >> hi >> can we hide a python code ? >> if i want to write a commercial software can i hide my source code from > [1] >> users access ? >> we can conver it to pyc but this file can decompiled ... so ...!! >> do you have any idea about this ...? >> >> --- >> First Iranian Open Source Community : www.python.ir > ^^[2] > > > [1] and [2] don't seem to be compatible. I suppose all of you who have commented about this, are sitting in the >>> free world <<< . But there are countries (like .ir) where the government has totally different ideas of 'freedom'. So taking the freedom to write something can be very dangerous at times. Fortunately most of those guys which intercept every email and check every web server are not so smart to reverse engineer everything in a short time since they have to check thousands of pieces of information each day. Let's make their work a bit harder! -- http://mail.python.org/mailman/listinfo/python-list
Re: using python to edit a word file?
Anthra Norell wrote:
> John,
>
> I have a notion about translating stuff in a mess and could help you
> with the translation. But it may be that the conversion
> from DOC to formatted test is a bigger problem. Loading the files into Word
> and saving them in a different format may not be a
> practical option if you have many file to do. Googling for batch converters
> DOC to RTF I couldn't find anything.
> If you can solve the conversion problem, pass me a sample file. I'll
> solve the translation problem for you.
>
> Frederic
What I ended up doing was just saving the Word file as an XML file, and
then writing a little script to process the text file. Then when it
opens back in Word, all the formatting remains. The script isn't ideal,
but it did the bulk of changing the numbers, and then I did a few things
by hand. I love having Python for these chores! :)
import re
xml_file = open('calendar.xml')
xml_data = xml_file.read()
xml_file.close()
pattern = re.compile(r'(\d+)')
def subtract(match_obj):
date = int(match_obj.group(1)) - 1
return '%s' % date
new_data = re.sub(pattern, subtract, xml_data)
new_file = open('calendar2007.xml', 'w')
new_file.write(new_data)
new_file.close()
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Re: schedule at specific hours
Take a look at http://sourceforge.net/projects/pycron/ . It may give you some ideas. Bob -- http://mail.python.org/mailman/listinfo/python-list
Re: converting a nested try/except statement into try/except/else
Boris Borcic wrote: > Boris Borcic wrote: >> John Salerno wrote: >>> In this case the method must return False, because it's a wxPython >>> method that needs a True or False value. If it doesn't, the program >>> will continue even after the error message. >> >> Just as it should do if the method returns True and no error message >> is produced if I understand you well... Are you sure ? I don't know >> wxPython, but this strikes me as surprisingly unpythonic behavior. > > I just verified on the wxWindows demo I had somehow installed on my box, > that indeed returning None appears to produce the same behavior as > returning True, distinct from the behavior obtained by returning False. > Ugh... But since None == False is false, isn't it right that returning None wouldn't necessarily behave like returning False? -- http://mail.python.org/mailman/listinfo/python-list
Re: some n00b question
Omar wrote: > b) I'm also interested in created GUI's sooner rather than later. Can > anyone point me to a fast track to doing GUI's on python? I recommend reading wxPython in Action. It's a great starter and reference to the wxPython GUI toolkit. Tkinter is usually considered easier and simpler, but I find it lacking in functionality, and wxPython is actually fairly easy to learn. -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
Paul Boddie wrote: > Fuzzyman wrote: > > I never understand the knee-jerk reaction on this mailing list to > > answer people who ask this question by telling them they don't really > > want to do it... > > Well, given the pace of technological development and the disregard in > some environments for perpetual backward compatibility, how much of > your infrastructure would you implement in vendor-supplied binaries, > especially when the vendor is a one man plus dog operation? When the > binaries don't work on your newly-upgraded system and the vendor is on > holiday (possibly for good), it doesn't look like a knee-jerk reaction > any more. It's worth remembering that there is a massive amount of software that has nothing to do with 'infrastructure', that won't need to be maintained, or upgraded. Examples include most retail software for the home or small office, and most entertainment software. Developers of such software often have understandable reasons for making it inconvenient to examine the algorithms at a high level. -- Ben Sizer -- http://mail.python.org/mailman/listinfo/python-list
Re: converting a nested try/except statement into try/except/else
Simon Forman wrote: > I'm sorry to hear that. I thought it was cleaner and more > understandable than that. May I indulge in explaining it a bit? I > can, perhaps, make it clearer. Thanks for the explanation. I find that with a little concentration, it's not that it's hard to follow the code, just that I feel like I will need to 're-concentrate' each time I come back to it, because of the different variables being used in different places. But I like the idea of making the try/except do very little, if not just one thing, so I'm going to keep studying it! :) -- http://mail.python.org/mailman/listinfo/python-list
Re: datetime to timestamp
John Machin <[EMAIL PROTECTED]> wrote: >On 11/08/2006 11:35 PM, John Machin wrote: >> On 11/08/2006 11:10 PM, Simen Haugen wrote: >>> How can I convert a python datetime to a timestamp? It's easy to convert >>> a timestamp to datetime (datetime.datetime.fromtimestamp(), but the >>> other way around...?) >> Is the timetuple() method what you want? > [ ... ] >Aaaarrrggghhh no it's not what you want -- [ ... ] It is if you only want it to the second. It just needs a time.mktime(): >>> n = time.time() >>> n 1155307613.4550381 >>> d = datetime.datetime.fromtimestamp(n) >>> time.mktime(d.timetuple()) 1155307613.0 (timetuple() is responsible for the loss of the fractional part.) -- \S -- [EMAIL PROTECTED] -- http://www.chaos.org.uk/~sion/ ___ | "Frankly I have no feelings towards penguins one way or the other" \X/ |-- Arthur C. Clarke her nu becomeþ se bera eadward ofdun hlæddre heafdes bæce bump bump bump -- http://mail.python.org/mailman/listinfo/python-list
Re: datetime to timestamp
[Simen Haugen] >>> How can I convert a python datetime to a timestamp? It's easy to convert >>> a timestamp to datetime (datetime.datetime.fromtimestamp(), but the >>> other way around...?) [John Machin] >> Is the timetuple() method what you want? >> >> #>>> import datetime >> #>>> n = datetime.datetime.now() >> #>>> n >> datetime.datetime(2006, 8, 11, 23, 32, 43, 109000) >> #>>> n.timetuple() >> (2006, 8, 11, 23, 32, 43, 4, 223, -1) [also John] > Aaaarrrggghhh no it's not what you want Yes, it is ;-) > -- looks like you have to do the arithmetic yourself, starting with > toordinal() It's just one step from the time tuple: import time time.mktime(some_datetime_object.timetuple()) The datetime module intended to be an island of relative sanity. Because the range of dates "timestamps" can represent varies across platforms (and even "the epoch" varies), datetime doesn't even try to produce timestamps directly -- datetime is more of an alternative to "seconds from the epoch" schemes. Because datetime objects have greater range and precision than timestamps, conversion is problem-free in only one direction. It's not a coincidence that that's the only direction datetime supplies ;-) -- http://mail.python.org/mailman/listinfo/python-list
Boost Install
Hi All, I am wondering if any have done an install of Boost for Python embedding? I have downoaded boost_1_33_1.exe, ran that and now have a boost_1_33_1 directory with plenty of items ine it. I have attempted to follow some online install directions which do not seem to work. I am using VS2005. I have tried, bjam "--with-python-version[=2.4] and just get a statement saying that bjam is not recognized. Really is no batch file or executable with that name in the boost directory. Not sure what to do to get the Boost.Python installed. Thanks for any help. Jeff -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
Fuzzyman wrote: > Tim Chase wrote: > [snip] >> However, it's better to have a good relationship with your >> customers and know that they will adhere to licensing conditions, >> rather than to try and strong-arm them into behaving a particular >> way. >> > > Don't forget that distributing your source code is more of a gift to > your competitors (and potential competitors) than it is to your > customers... > I believe Eric Raymond has argued that if your competitors are spending their time trying to work out how to adapt to using your software, that is time they aren't spending competing with you. So long as you make regular releases of your software you can ensure that they are always at least one step behind you. -- http://mail.python.org/mailman/listinfo/python-list
Inconsistency producing constant for float "infinity"
I'm investigating a puzzling problem involving an attempt to generate a constant containing an (IEEE 754) "infinity" value. (I understand that special float values are a "platform-dependent accident" etc...) The issue appears possibly to point to a bug in the Python compiler, with it producing inconsistent results. I'm using "Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310 32 bit (Intel)] on win32". This code sometimes produces a float of 1.0, sometimes infinity (or, since I'm on Windows, the float with string representation of "1.#INF"), as seen in the operand of the LOAD_CONST instruction: def floatstr(o, allow_nan=True): INFINITY = 1e6 # more code follows which does *not* rebind INFINITY >>> import dis >>> dis.dis(floatstr) 27 0 LOAD_CONST 1 (1.0) 3 STORE_FAST 2 (INFINITY) And, at other times, under circumstances I've yet to isolate: >>> import dis >>> dis.dis(floatstr) 27 0 LOAD_CONST 1 (1.#INF) 3 STORE_FAST 2 (INFINITY) ... I'll keep digging to narrow down what's going on, but I wondered if anyone had heard of or seen a similar problem, or is aware of an existing issue that could cause this. I checked the list on sourceforge but can't see anything relevant, nor did Google help. Just had a thought: could this be an issue involving "marshal" and either the writing of or reading of the .pyc file? Is it known to be unsafe to have Python source with special float constants? -Peter -- http://mail.python.org/mailman/listinfo/python-list
Tab delimited file
Hello, I am making a gui for the purpose that I can change the values in a list of different criteria which is found in a text file, such as: Name(tab)rating(tab)breast size(tab)occurrences … … … However as far as I know Python does not allow you to easily change a specific line in a text file. You have to place the whole file to memory, change what you need to and then write the file back after deleting the previous information. Assuming this is true, how do i find where the tabs are in the file so that I can distinguish between the different criteria? Assuming this is not true, does anyone suggest another way to do it? CoLe -- http://mail.python.org/mailman/listinfo/python-list
Re: using an already running COM object with Dispatch
Roger Upole wrote:
> "jiccab" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED]
> > Greetings.
> >
> > with the following code,
> >
> > olApp = Dispatch("Outlook.Application")
> >
> > I am capable of getting a new instance of Outlook running. I would
> > like to be able to use the instance that is already running, if exists,
> > otherwise open a new one.
> >
> > Has anyone being able to do this?
>
> You should be able to use
> win32com.client.GetActiveObject('outlook.application')
> and fall back to a normal Dispatch if it fails.
>
> Roger
Yes indeed. Thanks. here is the code:
from win32com.client.dynamic import Dispatch
from win32com.client import GetActiveObject
def OutlookPointer():
try:
olApp = GetActiveObject("Outlook.Application")
except:
olApp = Dispatch("Outlook.Application")
return olApp
op = OutlookPointer()
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Re: some n00b question
John Salerno wrote: > Omar wrote: > > > b) I'm also interested in created GUI's sooner rather than later. Can > > anyone point me to a fast track to doing GUI's on python? > > I recommend reading wxPython in Action. It's a great starter and > reference to the wxPython GUI toolkit. Tkinter is usually considered > easier and simpler, but I find it lacking in functionality, and wxPython > is actually fairly easy to learn. thanks, John anyone on the music side? -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
Ben Sizer wrote: > > It's worth remembering that there is a massive amount of software that > has nothing to do with 'infrastructure', that won't need to be > maintained, or upgraded. Examples include most retail software for the > home or small office, and most entertainment software. Developers of > such software often have understandable reasons for making it > inconvenient to examine the algorithms at a high level. It may be the case that certain kinds of applications can go on working forever on whatever hardware they were intended to run, right until the point when the hardware ceases to function correctly or when the end-user gets bored of it, or envious of the neighbour's hardware, or for whatever other reason. However, I've seen plenty of evidence of "home or small office" software which arrives as a binary, employs its own proprietary format, runs on now-legacy hardware and whose users are now high-and-dry with respect to accessing their old documents. Sure, developers of such software may not want their competitors to find out how their products work - certain companies also like to file patents for that added anticompetitive edge, should their competitors even consider figuring out the not-so-magic formula - but as end-users of software ourselves, we don't have to share such an understanding of their motivations, especially when such motivations directly conflict with our own: with respect to the above evidence, our own motivations are to have a reasonable level of control over the tools to manage our own data. It may not matter if some console game or other doesn't work after 20 years, although I think it's actually something of a shame given that such artifacts, no matter how apparently trivial they are, are actually part of our culture and shouldn't be so readily discarded and forgotten, but when your own data is not easily accessible within a much shorter timeframe, the scandal is (at least to me) so much more obvious. Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Tab delimited file
> However as far as I know Python does not allow you to easily change a
> specific line in a text file. You have to place the whole file to memory,
> change what you need to and then write the file back after deleting the
> previous information.
>
> Assuming this is true, how do i find where the tabs are in the file so that
> I can distinguish between the different criteria?
Well, I usually just use something like
NAME = 0
RATING = 1
SIZE = 2
OCCURS = 3
name = 'foo'
out = file('output.txt', 'w')
for line in file('input.txt'):
line = line.rstrip('\n')
items = line.split('\t')
# do something with items:
if name in items[NAME].lower():
items[RATING] = str(int(items[RATING]) + 1)
out.write('\t'.join(items))
out.write('\n')
which will loop through each line, incrementing the RATING field
(assuming it's numeric?) where the NAME field contains 'foo';
then writing the resulting stuff back out to the output file.
-tkc
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Re: Inconsistency producing constant for float "infinity"
Sybren Stuvel wrote: > Peter Hansen enlightened us with: > >>I'm investigating a puzzling problem involving an attempt to >>generate a constant containing an (IEEE 754) "infinity" value. (I >>understand that special float values are a "platform-dependent >>accident" etc...) > > Why aren't you simply using the fpconst package? Probably because it's not in the stdlib yet, assuming that's still true. (Using it might be an option anyway. I'm investigating a problem on Win32 with simplejson, so it would be Bob Ippolito's choice whether fpconst is a reasonable solution to the problem.) My guess about marshal was correct. The problem (value becoming 1.0) appears when running from .pyc files. Immediately after the source code is changed, the code works, since it doesn't unmarshal the .pyc file but just works from the bytecode freshly compiled in memory. This demonstrates what would be the heart of the problem, which I guess means this is not surprising to almost anyone, but perhaps will be a wakeup call to anyone who might still be unaware and has code that relies on constants like 1e producing infinities: >>> import marshal >>> marshal.dumps(1e666) 'f\x061.#INF' >>> marshal.loads(marshal.dumps(1e666)) 1.0 -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Boost Install
You should set PYTHON_ROOT & PYTHON_VERSION environment variable first, then set the VC toolset path, compile bjam.exe yourself and run bjam with -sTOOLS parameter. It seems Boost has not been totally tested under VS2005, but works fine with VS2003. Good luck! missdeer 2006-08-11 发件人： Hoop 发送时间： 2006-08-11 23:00:24 收件人： python-list@python.org 抄送： 主题： Boost Install Hi All, I am wondering if any have done an install of Boost for Python embedding? I have downoaded boost_1_33_1.exe, ran that and now have a boost_1_33_1 directory with plenty of items ine it. I have attempted to follow some online install directions which do not seem to work. I am using VS2005. I have tried, bjam "--with-python-version[=2.4] and just get a statement saying that bjam is not recognized. Really is no batch file or executable with that name in the boost directory. Not sure what to do to get the Boost.Python installed. Thanks for any help. Jeff -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: some n00b question
Omar wrote: > I'm learning how to program python. a few questions > > a) I'm mostly interested in creating exe's that have to do with music > -- things to help me keep track of chord progressions, transpositions, > etc. can anyone point me in the direction of resources on this? > > b) I'm also interested in created GUI's sooner rather than later. Can > anyone point me to a fast track to doing GUI's on python? > > thanks > To create .exe's you will need to get py2exe: http://www.py2exe.org/ I would add +1 to wxPython. It takes a little while to get going, IMHO it is the best Python GUI for Windows (it is also cross- platform if that interests you). -Larry -- http://mail.python.org/mailman/listinfo/python-list
Re: some n00b question
Omar wrote: > I'm learning how to program python. a few questions > > a) I'm mostly interested in creating exe's that have to do with music > -- things to help me keep track of chord progressions, transpositions, > etc. can anyone point me in the direction of resources on this? > > b) I'm also interested in created GUI's sooner rather than later. Can > anyone point me to a fast track to doing GUI's on python? > > thanks Hi Omar are you aware of lilypond, used for typesetting music? (not what you asked about I know!). 'lilycomp' is a simple (tkinter) gui for creating lilypond markup, maybe some ideas there. http://lilypond.org/web/ http://lilycomp.sourceforge.net/ hope that helps. Gerard -- http://mail.python.org/mailman/listinfo/python-list
Re: some n00b question
Gerard Flanagan wrote: > Omar wrote: > > I'm learning how to program python. a few questions > > > > a) I'm mostly interested in creating exe's that have to do with music > > -- things to help me keep track of chord progressions, transpositions, > > etc. can anyone point me in the direction of resources on this? > > > > b) I'm also interested in created GUI's sooner rather than later. Can > > anyone point me to a fast track to doing GUI's on python? > > > > thanks > > Hi Omar > > are you aware of lilypond, used for typesetting music? (not what you > asked about I know!). 'lilycomp' is a simple (tkinter) gui for > creating lilypond markup, maybe some ideas there. > > http://lilypond.org/web/ > > http://lilycomp.sourceforge.net/ > > hope that helps. > > Gerard thank you Larry and thank you Gerard! People on this forum are apparantly quite cool. -- http://mail.python.org/mailman/listinfo/python-list
Re: hide python code !
Paul Boddie wrote: > Ben Sizer wrote: > > > > It's worth remembering that there is a massive amount of software that > > has nothing to do with 'infrastructure', that won't need to be > > maintained, or upgraded. Examples include most retail software for the > > home or small office, and most entertainment software. Developers of > > such software often have understandable reasons for making it > > inconvenient to examine the algorithms at a high level. > > Sure, developers of such software may not want their competitors to > find out how their products work - certain companies also like to file > patents for that added anticompetitive edge, should their competitors > even consider figuring out the not-so-magic formula - but as end-users > of software ourselves, we don't have to share such an understanding of > their motivations, especially when such motivations directly conflict > with our own: with respect to the above evidence, our own motivations > are to have a reasonable level of control over the tools to manage our > own data. I think you're possibly being a bit idealistic here. I use and endorse open source and open formats wherever possible but I don't believe we would have the same degree of diversity of software available if everything was open. Imagine if you were the single-person developer of a small application that did something quite innovative, and charged a small fee for your product. Now imagine you were practically forced to make your algorithm obvious - a couple of months later, Microsoft bring out a freeware version and destroy your business in an instant. Sure, they and others can (and have) done that with closed-source products, but you increase your chances of survival 10-fold if the key algorithms are not obvious. The only other way to protect against that would be a software patent, and I disagree with their existence on the grounds that it punishes those who discover the techniques independently. > It may not matter if some console game or other doesn't work after 20 > years... Certainly; yet this is a valid example of software that requires a degree of protection since some of the algorithms employed truly are 'worth stealing'. They can usually be replicated in time, but that may be months and allows the original company to have a deserved commercial advantage. > ...although I think it's actually something of a shame given that > such artifacts, no matter how apparently trivial they are, are actually > part of our culture and shouldn't be so readily discarded and > forgotten... Thankfully we have emulators for most platforms, and hopefully litigation won't kill those off. > ...but when your own data is not easily accessible within a > much shorter timeframe, the scandal is (at least to me) so much more > obvious. I think it's quite possible to have a closed binary but an open document format, thus allowing the user to migrate away at any point while still preserving any 'secrets' in the implementation. -- Ben Sizer -- http://mail.python.org/mailman/listinfo/python-list
Re: How to write a Installer for a Python App in Linux
I saw some examples and understood for most part how to write a setpu.py. Since I want to bundle python and wxPython along with my application...how can I do that. Any code gurus can throw some pointers. Every help is appreciated. Bruno Desthuilliers wrote: > Look for distutil and EasyInstall (-> Python Eggs) -- http://mail.python.org/mailman/listinfo/python-list
Automate logging into page
I am trying to automate logging a website and have been unsuccessful. The code below is supposed to log me into the site, but changing the username/password to an incorrect combination does not cause an error or crash to be seen. My goal is to log into this page and save the cookie from the page so that when I spawn IE and navigate to this site I will be logged in. I am using the urllib2 module. Any suggestions?
import urllibimport urllib2url = ''values = {'id_l_email': 'X', 'id_l_password':'X'}data = "">req = urllib2.Request(url,data)response = urllib2.urlopen(req)the_page = response.read()
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Re: Read a file with open command
Sorry, but the access mode is not binary with XP Windows. Finally for
reading the file it is necessary to use a slash or a double backslash.
If the file is a simple textfile, using a backslash is perhaps not
recommended but it is functionning.
Anyway many thanks.Here is the program:
>>> file_obj= open ("D:/Mes documents/ADB Anna.ods",'r')
>>> s = file_obj
>>> s.readlines()
Jean-Jeanot
Jan Svec a écrit :
> Hi,
> simply use file_obj = open ("D:\My documents\File.ods",'rb') for
> opening file in binary access mode, which is required for binary files
> on MS Windows.
> Honza
>
> jean-jeanot wrote:
> > I can access to a file with the command:
> > file_obj = open ( " D:\My documents\Textfile.txt",'r')
> >
> > When I now try to read a file with the following command:
> >
> > file_obj = open ("D:\My documents\File.ods",'r') it doesn't function.
> > The extension ods is coming from OpenOffice.org Calc.
> >
> > Why ?
> >
> > jean-jeanot
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Re: using python to edit a word file?
No one could do it any better. Good for you! - Frederic
- Original Message -
From: "John Salerno" <[EMAIL PROTECTED]>
Newsgroups: comp.lang.python
To:
Sent: Friday, August 11, 2006 4:08 PM
Subject: Re: using python to edit a word file?
> Anthra Norell wrote:
> > John,
> >
> > I have a notion about translating stuff in a mess and could help you
> > with the translation. But it may be that the
conversion
> > from DOC to formatted test is a bigger problem. Loading the files into Word
> > and saving them in a different format may not be a
> > practical option if you have many file to do. Googling for batch converters
> > DOC to RTF I couldn't find anything.
> > If you can solve the conversion problem, pass me a sample file. I'll
> > solve the translation problem for you.
> >
> > Frederic
>
> What I ended up doing was just saving the Word file as an XML file, and
> then writing a little script to process the text file. Then when it
> opens back in Word, all the formatting remains. The script isn't ideal,
> but it did the bulk of changing the numbers, and then I did a few things
> by hand. I love having Python for these chores! :)
>
>
>
> import re
>
> xml_file = open('calendar.xml')
> xml_data = xml_file.read()
> xml_file.close()
>
> pattern = re.compile(r'(\d+)')
>
> def subtract(match_obj):
> date = int(match_obj.group(1)) - 1
> return '%s' % date
>
> new_data = re.sub(pattern, subtract, xml_data)
>
> new_file = open('calendar2007.xml', 'w')
> new_file.write(new_data)
> new_file.close()
> --
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having issues Installing Python 2.5b3 on Windows XP
I installed python 2.5b3 on my windows XP sp2 box without any issues. I can double click the python program, and idle comes up in the command line window. However when I run python from the command line program cmd.exe, I get a pop-up window with the following error: 16 bit Windows Subsystem - The NTVDM CPU has encountered an illegal instruction. CS:020c IP:0115 OP:0f 00 00 00 00 Choose 'Close' to terminate the application. If I run python from the command line with the full path, C:\Python25\python, no problem. I checked my environment variables and they are pointing to the correct directories. I am at a loss for waht is causing the issue. Active state python 2.4 worked from the command line with no issues. I know 2.5b3 is beta, but I would like to try and get it running properly. At the very least, I would like someone to report this bug so that the final version gets fixed. Please don't say reboot. I have already tried that, same problem. I am going to try to install python 2.4 with the msi installer and see if I have the same issue with that version. If anyone else has any ideas please help. Thanks:) SA -- http://mail.python.org/mailman/listinfo/python-list
Re: Read a file with open command
On 11 Aug 2006 09:39:23 -0700, jean-jeanot <[EMAIL PROTECTED]> wrote:
> Anyway many thanks.Here is the program:
>
> >>> file_obj= open ("D:/Mes documents/ADB Anna.ods",'r')
> >>> s = file_obj
> >>> s.readlines()
Please remember not to top-post :)
Try this
>>> s = open ("D:/Mes documents/ADB Anna.ods",'r')
>>> s.readlines()
>>> s.close()
or
>>> s = open ("D:/Mes documents/ADB Anna.ods",'r').readlines()
HTH :)
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Re: Tkinter module not found
Shuaib wrote: > Hey, > > Even though I freshly installed Tcl and Tk, python still seem to have > problems accessing Tkinter module. Here is what says when I do "import > Tkinter" > > == > Traceback (most recent call last): > File "", line 1, in ? > ImportError: No module named Tkinter > == > > Any ideas how to fix this problem? (Gentoo distribution) > > Thanks. That happened once to me when I compiled python without tcl/tk installed (prior to compiling) -- http://mail.python.org/mailman/listinfo/python-list
Re: PIL Image transform
On 2006-08-09, Dean Card <[EMAIL PROTECTED]> wrote:
> Okay, so here is the situation. I have need to do some on-the-fly image
> creation. I have everything working great except for the last part of it,
> applying a perspective type transform to the image. The transform will take
> a rectangular 2D image and transform it to a 3D representation in 2D.
>
> Please see the link to see what I am trying to do:
> http://seanberry.com/transform.png
>
> I have PIL v1.15 installed which has a PERSPECTIVE transform, but it does
> not appear to do what I want - or I can't figure out how to use it correctly
> because it is using a transform matrix's coefficients.
>
> Here is the only info I could find on the usage:
> http://mail.python.org/pipermail/image-sig/2005-February/003198.html
This looks like a correct description of the sources:
In Image.py:
elif method == PERSPECTIVE:
# change argument order to match implementation
data = (data[2], data[0], data[1],
data[5], data[3],
data[4],
data[6],
data[7])
and then in Geometry.c:
static int
perspective_transform(double* xin, double* yin, int x, int y, void*
data)
{
double* a = (double*) data;
double a0 = a[0]; double a1 = a[1]; double a2 = a[2];
double a3 = a[3]; double a4 = a[4]; double a5 = a[5];
double a6 = a[6]; double a7 = a[7];
xin[0] = (a0 + a1*x + a2*y) / (a6*x + a7*y + 1);
yin[0] = (a3 + a4*x + a5*y) / (a6*x + a7*y + 1);
return 1;
}
> This is for the creation of images to be used in Flash. Originally I was
> doing the image processing in Flash because Flash 8 has a BitmapData class
> which does the basics of images, copy, transform, etc. To accomplish the
> transform I was using an algorithm that approximated triangles to fill and
> worked really well, but I need the image processing to be server side, not
> client.
>
> So, here I am. Anyone have any idea how to accomplish my goal here? Is
> there a way to fill a triangle with a bitmap using PIL? What about better
> docs on the PERSPECTIVE transform?
>
> Thanks for any and all help on this.
Something like this is almost what you what:
im = im.transform(im.size, Image.PERSPECTIVE, (1, 0, 0, 0, 1, 0, -0.004, 0))
But the problem really is that the top row of the image is at at y of
0-- I think you want the origin of the image to be in the centre for
this to work properly.
Is there a way to do that in PIL?
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Re: Read a file with open command
Dear Sybrel, I am delighted to know that you have been enlighted through my question. I am aware of my stupidity and I would say of my ignorance.If all Python users were not ignorant I suppose the Python group would be superfluous. I would suggest that if if you think that a question is supid please do not answer it.In French we say: "There is no stupid question but answers can be stupid". For the citation of Zappa I am convinced that when Zappa is speaking of world stupidity he is thinking to stupidity and wickedness of mankind and not to ignorance. Anyway the open command with a file having the extension ods must be used with a slash. But with a double backslash it is functionning too. In every documentation I posess on Python it is mentioned that an absolute path in Windows starts with a backslash.Python accepts platform-specific syntax ( See Python by C. Fehilly , p 306, Python in a nutshell by Martelli, etc,etc) Anyway thank you for your answer. jean-Jeanot Sybren Stuvel a écrit : > jean-jeanot enlightened us with: > > I can access to a file with the command: > > file_obj = open ( " D:\My documents\Textfile.txt",'r') > > Which is the wrong way. Use forward slashes, escape your backslashes, > or use raw strings. > > Sybren > -- > The problem with the world is stupidity. Not saying there should be a > capital punishment for stupidity, but why don't we just take the > safety labels off of everything and let the problem solve itself? > Frank Zappa -- http://mail.python.org/mailman/listinfo/python-list
Re: How to write a Installer for a Python App in Linux
Hi, How can we freeze the python program and how will it ensure that all the python files are packages with the programs (including python and wxPython). Can anybody give me some pointers on this. Every help is appreciated. Thanks. > You could freeze the Python program. That'll ensure all the required > files are packaged with your program, including Python itself. If you > build a RPM from that, your users will be quite happy. > Sybren -- http://mail.python.org/mailman/listinfo/python-list
Including python and wxPython in distutils
I wrote a small app in python and used wxPython in it. Now, I am trying to create an .rpm file for linux RedHat Distro. I want the ability in my installer to install python2.4 and wxPython too along with the .py files which are in the project. I am trying to use distutils. Can anybody give some pointers to do this fast ? Every help is greatly appreciated. -- http://mail.python.org/mailman/listinfo/python-list
Re: What's the cleanest way to compare 2 dictionary?
John Machin wrote: > John Henry wrote: > > John, > > > > Yes, there are several scenerios. > > > > a) Comparing keys only. > > > > That's been answered (although I haven't gotten it to work under 2.3 > > yet) > > (1) What's the problem with getting it to work under 2.3? > (2) Why not upgrade? > Let me comment on this part first, I am still chewing other parts of your message. When I do it under 2.3, I get: common_eq = set(k for k in _common if a[k] == b[k]) ^ SyntaxError: invalid syntax Don't know why that is. I can't upgrade yet. Some part of my code doesn't compile under 2.4 and I haven't got a chance to investigate further. -- http://mail.python.org/mailman/listinfo/python-list
