Mark McEahern wrote:
It doesn't appear so. A workaround, of course, is to create a new file
with the subset of files from the old file:
That is actually the *only* way to do that. tarfiles cannot be "sparse",
in the sense that parts of the file can be marked as deleted. So in
order to delete a fi
Please consider the timings below, where a generator expression starts
out slower than the equivalent list comprehension, and gets worse:
>python -m timeit -s "orig=range(10)" "lst=orig[:];lst[:]=(x for x
in orig)"
10 loops, best of 3: 6.84e+004 usec per loop
>python -m timeit -s "orig=range(
John Machin wrote:
>> (if you have 2.4, try replacing [] with () and see what happens)
>
> The result is a generator with a name ("lst") that's rather misleading
> in the context.
according to my dictionary, the word "list" means "A series of names, words,
or other items written, printed, or imag
John Machin wrote:
> Given a requirement to mutate the original list, this necessitates the
> assignment
> to lst[:].
do you always pull requirements out of thin air?
--
http://mail.python.org/mailman/listinfo/python-list
John Machin wrote:
Nick Coghlan wrote:
The effbot's version is still going to be faster though:
lst = [x for x in lst if x != 2]
Have you measured this?
Nope. I'm going purely on the fact that it is O(n), and the in-place
modification will always be worse than that.
Cheers,
Nick.
--
Nick Coghl
John Machin wrote:
Background: There was/is a very recent thread about ways of removing
all instances of x from a list. /F proposed a list comprehension to
build the result list. Given a requirement to mutate the original list,
this necessitates the assignment to lst[:]. I tried a generator
express
On Sat, 15 Jan 2005 15:27:08 -0500, skull <[EMAIL PROTECTED]> wrote:
>
>Hi everybody, it is my first post in this newsgroup.
>I am a newbie for python though I have several years development experience in
>c++.
>recently, I was stumped when I tried to del item of a list when iteration.
>
>here is
On Sat, 15 Jan 2005 11:00:36 -0800, Scott David Daniels <[EMAIL PROTECTED]>
wrote:
>G.Franzkowiak wrote:
>> Scott David Daniels schrieb:
>>
>>> franzkowiak wrote:
>>>
I've read some bytes from a file and just now I can't interpret 4
bytes in this dates like a real value. An extract f
Hello Ashot,
> I need to write a video analysis tool which extracts statistics from
> microsocope video. Essentially what I need is to translate the video data
> into numerical matrices. I have been using Python for the past 1.5 years
> anytime I could for absolutely everything, becaus
Bengt Richter wrote:
> No one seems to have suggested this in-place way yet,
> so I'll trot it out once again ;-)
>
> >>> lst = [1, 2, 3]
> >>> i = 0
> >>> for item in lst:
> ...if item !=2:
> ...lst[i] = item
> ...i += 1
> ...
> >>> del lst[i:]
> >>> lst
> [1, 3]
Wo
Hi,
I need to access class variables of a class I'd like to make private:
i.e.
class __Bar(object):
pass
class __Foo(__Bar):
def __init__(self):
super(__Foo, self).__init__()
>>> __Foo()
Name Error: global name '_Foo__Foo' is not defined
Here I want to prevent the user of instanciating
there's a socket.sendall(), so why no socket.recvall()?
BTW socket.sendall() doesn't actually work for large amounts
of data on Windows 2000 and probably other versions of
Windows as well. Eg if you supply a 1MB buffer then you get
an exception based on some internal Windows error code.
I ha
Hi all,
I'm a java programmer struggling to come to terms with python - bear
with me!
I'm trying to subclass a class, and I want to be able to see it's
attributes also. Here are my classes:
one.py:
*
class one:
def __init__(self):
print "one"
self
Uwe Mayer wrote:
Hi,
I need to access class variables of a class I'd like to make private:
Use single underscores instead of double underscores--you won't have to
workaround the name mangling. Besides, nothing's really private anyway.
// m
--
http://mail.python.org/mailman/listinfo/python-lis
On Jan 16, 2005, at 9:08 AM, bwobbones wrote:
class two(one):
def __init__(self):
print "two"
You need to specifically call the superclass's __init__ here in order
for it to fire. Just add the line
super(two, self).__init__()
as the first line of the subclass's __init__.
__
bwobbones wrote:
Hi all,
I'm a java programmer struggling to come to terms with python - bear
with me!
Welcome!
I'm trying to subclass a class, and I want to be able to see it's
attributes also. Here are my classes:
[snip]
class two(one):
def __init__(self):
print "two"
The problem i
Roger Binns wrote:
there's a socket.sendall(), so why no socket.recvall()?
BTW socket.sendall() doesn't actually work for large amounts
of data on Windows 2000 and probably other versions of
Windows as well. Eg if you supply a 1MB buffer then you get
an exception based on some internal Windows er
In article <[EMAIL PROTECTED]>,
Ed Leafe <[EMAIL PROTECTED]> wrote:
> On Jan 16, 2005, at 9:08 AM, bwobbones wrote:
>
> > class two(one):
> >def __init__(self):
> >print "two"
>
> You need to specifically call the superclass's __init__ here in order
> for it to fire. Just add
John Machin wrote:
I've taken your code and improved it along the
suggested lines, added timing for first, middle, and last elements,
added several more methods, and added a testing facility as well. Would
you like a copy?
Actually I think it would be great if you posted it here for our
combined ed
"John Machin" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Please consider the timings below, where a generator expression starts
> out slower than the equivalent list comprehension, and gets worse:
>
> >python -m timeit -s "orig=range(10)" "lst=orig[:];lst[:]=(x for x
> in ori
Where can I download python-itools?
I found it in the python packages index but the site
is not contactable.
Thank you.
--
http://mail.python.org/mailman/listinfo/python-list
[Bengt Richter]
...
> But I don't know how to build QNaNs:
You can subtract infinity from infinity. While all Python behavior in
the presence of NaNs, infinities, and signed zeroes is a
platform-dependent accident, it you're on a box that has such things,
and figure out some (accidental!) way to
På 15. jan 2005 kl. 16:16 skrev .removethis.:
>>> import glob
>>> from os.path import isfile
>>> print filter(isfile, glob.glob('/tmp/*')) # can use patterns
Nice example of when filter() is better than list comprehension.
[f for f in glob.glob("/tmp/*") if isfile(fi)]
is a bit too verbose, the ite
Uwe Mayer wrote:
> I need to access class variables of a class I'd like to make private:
>
> i.e.
> class __Bar(object):
> pass
>
> class __Foo(__Bar):
> def __init__(self):
> super(__Foo, self).__init__()
>
__Foo()
> Name Error: global name '_Foo__Foo' is not defined
>
> Here I w
http://www.twistedmatrix.com/
Daniel Bickett
--
http://mail.python.org/mailman/listinfo/python-list
Torsten Mohr wrote:
is there some string class that i can change in place,
like perls strings?
array.array is mutable. You can use the 'c' code if
you want an array of characters.
Is it possible to do some regex replacement functions
that would even change its length?
You can't use re.sub array, bu
Torsten Mohr wrote:
reading the documentation (and also from a hint from this NG)
i know now that there are some types that are not mutable.
But why is it this way?
There are various reasons, some apply for some types, and
some for others:
- immutable objects are hashable - their hash value will no
Patch / Bug Summary
___
Patches : 272 open ( +5) / 2737 closed (+10) / 3009 total (+15)
Bugs: 793 open ( -5) / 4777 closed (+29) / 5570 total (+24)
RFE : 165 open ( +0) / 141 closed ( +1) / 306 total ( +1)
New / Reopened Patches
__
Enhance t
Nick Coghlan wrote:
# Anonymous functions
use res:
def f(x):
d = {}
exec x in d
return d
in:
res = [f(i) for i in executable]
as for me, I found construction "use :" unobvious and confusing.
Also there is great possibility to forget some of variables names.
I think that syntax
wher
I am working on a python project where an object will have a script that
can be edited by the end user: object.script
If the script is a simple one with no functions, I can easily execute it
using:
exec object.script
But if the object script is a bit more complicated, such as the example
belo
nell wrote:
Hi Steve,
First the "10x in advance" means thanks in advance.
The main importance of protecting my code is to save headache of
customers that want to be smart and change it and then complain on bugs
and problems.
10x
I'd say that's more of a policy issue than a technical issue. You have
On Sun, 16 Jan 2005 22:08:13 +0800, bwobbones wrote:
> Hi all,
>
> I'm a java programmer struggling to come to terms with python - bear
> with me!
Christophe already identified the problem, I wanted to address another
Javaism in your code, for your educational benefit.
Speaking "idiomaticall
Hi !
Scriptomatic 2.0 can, now, to generate scripts in Python.
Download :
http://www.microsoft.com/downloads/thankyou.aspx?FamilyID=09dfc342-648b-4119-b7eb-783b0f7d1178&displaylang=en
Note : scriptomatic is a generator of WMI's scripts, for Windows, (and
compatibles WBEM).
Good night
--
Mi
I'm done porting the C code, but now when running the script I
continually run into problems with lists. I tried appending and
extending the lists, but with no avail. Any help is much appreciated
Please see both the Python and C code at
http://home.earthlink.net/~lvraab. The two files are ENIGM
bwobbones wrote:
> Hi all,
>
> I'm a java programmer struggling to come to terms with python - bear
> with me!
>
> I'm trying to subclass a class, and I want to be able to see it's
> attributes also. Here are my classes:
>
> two.py
> *
> from one import one
>
>
On 2005-01-16, Lucas Raab <[EMAIL PROTECTED]> wrote:
> I'm done porting the C code, but now when running the script I
> continually run into problems with lists. I tried appending and
> extending the lists, but with no avail. Any help is much appreciated
> Please see both the Python and C code a
På 14. jan 2005 kl. 22:58 skrev Steven Bethard:
(Any mac users? How do I fix this to appear in Norwegian? =)
Note that if you're not comfortable with short-circuiting behavior,
you can also code this using lazy evaluation:
(lambda: 1/x, lambda: 1.0e99)[x==0]()
.. and people wonder why so many
© # the following is a example of defining
© # a function in Python.
©
© def fib(n):
© """This prints n terms of a sequence
© where each term is the sum of previous two,
© starting with terms 1 and 1."""
© result=[];a=1;b=1
© for i in range(n):
© result.append(b)
©
Torsten Mohr <[EMAIL PROTECTED]> wrote:
> reading the documentation (and also from a hint from this NG)
> i know now that there are some types that are not mutable.
>
> But why is it this way?
>
> From an overhead point of view i think it is not optimal,
> for example for a large string it could
On Sun, 16 Jan 2005 12:18:23 GMT, "Raymond Hettinger"
<[EMAIL PROTECTED]> wrote:
>"John Machin" <[EMAIL PROTECTED]> wrote in message
>news:[EMAIL PROTECTED]
>> Please consider the timings below, where a generator expression starts
>> out slower than the equivalent list comprehension, and gets wors
ionel wrote:
how to make a efficient server.. please point me to some good and clear examples
I nominate SocketServer.ThreadingTCPServer from the standard library.
--Irmen
--
http://mail.python.org/mailman/listinfo/python-list
Nick Coghlan:
>There's a similar performance glitch associated with constructing a
tuple from a generator expression (with vanilla 2.4, detouring via list
is actually faster)
You look right:
.from time import clock
.print "[x for x in l], list(x for x in l), aux = list(x for x in l);
tuple(aux),
[Raymond Hettinger]
> >List slice assignment is an example of a tool with a special case
optimization
> >for inputs that know their own length -- that enables the tool to
pre-allocate
> >its result rather than growing and resizing in spurts. Other such tools
include
> >tuple(), map() and zip().
[
Raymond Hettinger wrote:
> Check out the current source. The time machine beat you to it.
Nick's other suggestion - that genexps propagate __len__ - might still
be interesting. Of course, it would only be applicable for unconditional
genexps(i.e. no if clause).
Tim Delaney
--
http://mail.python
Cameron Laird wrote:
In article <[EMAIL PROTECTED]>,
Jon Perez <[EMAIL PROTECTED]> wrote:
Can someone summarize in a nutshell what is the
difference between JPype and JPE?
JPE's the original. It provided more functionality than JPype has
achieved so far, I believe (though that could change any d
Hi Steve,
First the "10x in advance" means thanks in advance.
The main importance of protecting my code is to save headache of
customers that want to be smart and change it and then complain on bugs
and problems.
10x
--
http://mail.python.org/mailman/listinfo/python-list
Stian Soiland wrote:
På 14. jan 2005 kl. 22:58 skrev Steven Bethard:
(Any mac users? How do I fix this to appear in Norwegian? =)
Note that if you're not comfortable with short-circuiting behavior,
you can also code this using lazy evaluation:
(lambda: 1/x, lambda: 1.0e99)[x==0]()
.. and peo
M.E.Farmer wrote:
>
> Erik glad to see you were able to track it down.
> Have you been succesful in making the changes they mentioned?
> M.E.Farmer
Yes below is a simple script that works. The key was that pygame uses
freesansbold.ttf as the default font and that is not copied over in the
normal
Rakesh schrieb:
> What I want is to *group the messages belonging to each thread* .
Hello
Why not sort with Message-ID and References?
Attention - it is a Newbie-Solution.
import nntplib
hamster = nntplib.NNTP('127.0.0.1', 119, 'user', 'pass')
resp, count, first, last, name = hamster.group('co
Werner Amann wrote:
Rakesh schrieb:
What I want is to *group the messages belonging to each thread* .
Hello
Why not sort with Message-ID and References?
Attention - it is a Newbie-Solution.
import nntplib
hamster = nntplib.NNTP('127.0.0.1', 119, 'user', 'pass')
resp, count, first, last, name = ha
Roy Smith wrote:
> Torsten Mohr <[EMAIL PROTECTED]> wrote:
> > reading the documentation (and also from a hint from this NG)
> > i know now that there are some types that are not mutable.
> >
> > But why is it this way?
> >
> > From an overhead point of view i think it is not optimal,
> > for examp
nell wrote:
Hi Steve,
First the "10x in advance" means thanks in advance.
The main importance of protecting my code is to save headache of
customers that want to be smart and change it and then complain on bugs
and problems.
10x
I'd have understood "tnx", never seens 10x b4 :-)
Your concerns are
In article <[EMAIL PROTECTED]>,
"Dan Bishop" <[EMAIL PROTECTED]> wrote:
> Roy Smith wrote:
> > Torsten Mohr <[EMAIL PROTECTED]> wrote:
> > > reading the documentation (and also from a hint from this NG)
> > > i know now that there are some types that are not mutable.
> > >
> > > But why is it thi
Hi,
I'm working on a new version of PythonMagick, a wrapper for
GraphicsMagick. A first version is available at:
http://public.procoders.net/cgi-bin/trac.cgi/wiki/PythonMagick
Any feedback is very appreciated.
regards,
Achim
--
http://mail.python.org/mailman/listinfo/python-list
In article <[EMAIL PROTECTED]>,
Nils Nordman <[EMAIL PROTECTED]> wrote:
>On Tue, Jan 11, 2005 at 03:32:01AM -0800, Flavio codeco coelho wrote:
>> So my question is: how can I check for the availability of X? i.e.,
>> How will my program know if its running in a text only console or in
>> console w
In article <[EMAIL PROTECTED]>,
Roger Binns <[EMAIL PROTECTED]> wrote:
.
.
.
>> runner.py:200: Function (detectMimeType) has too many returns (11)
>>
>> The function is simply a long "else-if" clause, branching out to different
> yes i know it's related to search path, but i don't know how to set it in a
> practical way (beside hard coding).
> my concern is, if i want to create a custom module/library, i don't know
> what py file will import it and where the working directory should be.
Regarding where the current workin
Lucas Raab wrote:
Please see both the Python and C code at
http://home.earthlink.net/~lvraab. The two files are ENIGMA.C and engima.py
If you post a small testcase here you are much more likely to get helped.
--
Michael Hoffman
--
http://mail.python.org/mailman/listinfo/python-list
Torsten Mohr schrieb:
reading the documentation (and also from a hint from this NG)
i know now that there are some types that are not mutable.
But why is it this way?
Immutable types (e.g. strings, tuples) allow for code optimization
in some situations and can be used as dictionary keys. For the la
skull wrote:
> According to Nick's article, I added three 'reversed' methods to your
provided
> test prog. and the result turned out method_reversed is faster than
others except the 'three' case.
> Following is my modified version:
[snip]
> def method_reversed_idx(lst):
> idx = 0
> for i
Craig Howard wrote:
I am working on a python project where an object will have a script that
can be edited by the end user: object.script
If the script is a simple one with no functions, I can easily execute it
using:
exec object.script
But if the object script is a bit more complicated, su
Thanks for your help Steve and F. Petitjean. Sorry for taking so long
to get back, I was away from my lab for a few days.
The path to my directory was not included in the sys.path list. Adding
a my.pth file to the site-packages directory fixed the import problem.
F. Petitjean, I originally edited
Simon Brunning <[EMAIL PROTECTED]> writes:
> On Wed, 12 Jan 2005 23:19:44 +0800, sam <[EMAIL PROTECTED]> wrote:
>>
>> No, I don't use MS windows. I need to generate Excel file by printing
>> data to it, just like Perl module Spreadsheet::WriteExcel.
> If you need to write out formulae, formrattin
Grant Edwards wrote:
On 2005-01-16, Lucas Raab <[EMAIL PROTECTED]> wrote:
I'm done porting the C code, but now when running the script I
continually run into problems with lists. I tried appending and
extending the lists, but with no avail. Any help is much appreciated
Please see both the Python
"Lucas Raab" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> I'm done porting the C code, but now when running the script I
> continually run into problems with lists. I tried appending and
> extending the lists, but with no avail. Any help is much appreciated
> Please see both the Py
"Paul McGuire" <[EMAIL PROTECTED]> wrote:
> "A" == 'a' is true in Python, not true in C.
It could be true in C, if the string is stored in very low memory :-)
--
http://mail.python.org/mailman/listinfo/python-list
Paul McGuire wrote:
So "A" == 'a' is true in Python, not true in C.
>>> "A" == 'a'
False
I think you meant:
>>> "A" == "A"
True
--
Michael Hoffman
--
http://mail.python.org/mailman/listinfo/python-list
Paul McGuire wrote:
So "A" == 'a' is true in Python, not true in C.
It's not true in Python either.
You probably meant to say: "a" == 'a'
(lowercase a)
--Irmen
--
http://mail.python.org/mailman/listinfo/python-list
Lucas Raab wrote:
Grant Edwards wrote:
http://www.catb.org/~esr/faqs/smart-questions.html
I didn't expect to get bitched out just because I didn't follow "protocol."
I didn't see anyone bitch you out. And you were lucky that one
person was kind enough to go through your web site and make some
sug
In my experience (as a tester), it is easier to deal with PYTHONPATH
than to add the my.pth file to the site-packages directory. The main
reason is that I have my custom packages and modules in a directory
tree that I deploy on many clients/servers/platforms/OS versions, some
running different vers
Michael Hoffman wrote:
Paul McGuire wrote:
So "A" == 'a' is true in Python, not true in C.
I think you meant:
>>> "A" == "A"
True
Er, "A" == 'A'
--
Michael Hoffman
--
http://mail.python.org/mailman/listinfo/python-list
Xah Lee wrote:
© ok, here's the ordeal.
©
© for i in range(5):
© print i
© for i in range(2):
© print i, 'tt'
© for i in [3]:
© print i
© for i in [32]:
© print i
©
© # 1 level, 4 space
© # 2 level, 1 tab
© # 3 level, 1 tab, 4 spaces
© # 4 level
On 2005-01-16, Lucas Raab <[EMAIL PROTECTED]> wrote:
>>>Please see both the Python and C code at
>>>http://home.earthlink.net/~lvraab. The two files are ENIGMA.C
>>>and engima.py
>>
>> http://www.catb.org/~esr/faqs/smart-questions.html
>
> I didn't expect to get bitched out just because I didn'
Jeremy Bowers wrote:
(Hell, five days into Python and some people are already producing working
Backgammon games (I think that was the post last week), and Xah Lee here
is still on for loops! Woo! Go Xah!)
Mah Jongg, actually (if we're thinking of the same post), which
name is often applied in the
© # -*- coding: utf-8 -*-
© # Python
©
© # the "filter" function can be used to
© # reduce a list such that unwanted
© # elements are removed.
© # example:
©
© def even(n): return n % 2 == 0
© print filter( even, range(11))
©
©
© # the "map" function applies a function
© # to all elements of a list
"Michael Hoffman" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Michael Hoffman wrote:
> > Paul McGuire wrote:
> >> So "A" == 'a' is true in Python, not true in C.
> > I think you meant:
> >
> > >>> "A" == "A"
> > True
>
> Er, "A" == 'A'
> --
> Michael Hoffman
Yeah, that's the on
In the fnctl docs for both python 2.3 and 2.4 there is a note at the
bottom that says
The os.open() function supports locking flags and is available on
a wider variety of platforms than the lockf() and flock()
functions, providing a more platform-independent file locking
facility.
Xah Lee wrote:
© Note: this post is from the Perl-Python
© a-day mailing list at
© http://groups.yahoo.com/group/perl-python/
Is there any chance you could post these all as part of the same thread?
That would be really nice for those of us who aren't interested --
then we could just ignore the
hello
i need a program (and pleas shoe me the modol in the softwar) that :
if i have a scaned photo
i want to define out of each poligon color ,as it seems in the photo,
the cmyk
in % (percets) of the color/
4 exampl from poligon color orang defin the cmyk in %
like that: (example)
c: 30%
m:56%
y:7
[EMAIL PROTECTED] wrote:
> hello
> i need a program (and pleas shoe me the modol in the softwar) that :
> if i have a scaned photo
> i want to define out of each poligon color ,as it seems in the photo,
> the cmyk
> in % (percets) of the color/
> 4 exampl from poligon color orang defin the cmyk in
Steven Bethard wrote:
Is there any chance you could post these all as part of the same thread?
That would be really nice for those of us who aren't interested --
then we could just ignore the thread...
Or, better yet, not posting it at all. He's got his mailing list, what
does he need to pos
On Sun, Jan 16, 2005 at 09:57:46PM -0800, [EMAIL PROTECTED] wrote:
> hello
> i need a program (and pleas shoe me the modol in the softwar) that :
> if i have a scaned photo
> i want to define out of each poligon color ,as it seems in the photo,
> the cmyk
> in % (percets) of the color/
> 4 exampl f
Xah Lee wrote:
© my $n= @_[0];
Do you ever test your code before making fun of yourself in front of
millions?
*plonk*
--Ala
--
http://mail.python.org/mailman/listinfo/python-list
Hi
Am 16.01.2005 12:44:27 schrieb Miki Tebeka:
> 1. There is PyMedia (http://pymedia.org/)
Is this library able to extract single images from a video? AFAICS it
can only convert videos from one format to another. But I didn't try it,
I've looked only in the docu.
Maybe pyVideo (http://www.geoci
I download the source code of Python-2.3.4 from python.org.
But I can't build python from source under Win2000. The compiler complained that
there is no pythonnt_rc_d.h file which is included in
Python-2.3.4\PC\python_nt.rc.
Who knows the reason ?
Thanks.
Best Regards.
R
On Mon, 17 Jan 2005 08:08:46 +0100, Alexander 'boesi' Bösecke
<[EMAIL PROTECTED]> wrote:
Hi
Am 16.01.2005 12:44:27 schrieb Miki Tebeka:
1. There is PyMedia (http://pymedia.org/)
Is this library able to extract single images from a video? AFAICS it
can only convert videos from one format to anoth
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