Re: May i customize basic operator (such as 1==3)?
kanchy kang wrote: > many people write test cases with python scripts. > in these test scripts, there are many validation statements, > for example, in unittest, failUnless(a == b),(a/b may be stringType or > intType...) > > during running test scripts, if there is one exception raised from > failUnless, i still do not know a =?, b= ?... i have to add one statment > "print a" or "print b" again... > > as i know, there are many validation statements if using python as one > test tool... > i think my suggestion or requirement may benefit users greatly... > A test framework will contain many tests for equality that have nothing to do with the tests themselves. So the real answer to this problem is to have the tests be more explicit when they need to be. A testEqual(a, b) test function would seem to be a more sensible approach than radical surgery on the interpreter. The function can then print its arguments if they turn out to be unequal. Otherwise there would have to be some *very* selective mechanism to decide when the comparison arguments were printed out. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
RE: [Numpy-discussion] algorithm, optimization, or other problem?
You may get a significant boost by replacing the line:
w=w+ eta * (y*x - y**2*w)
with
w *= 1.0 - eta*y*y
w += eta*y*x
I ran a test on a similar expression and got 5 fold speed increase.
The dot() function runs faster if you compile with dotblas.
Nadav.
-Original Message-
From: [EMAIL PROTECTED] on behalf of Bruce Southey
Sent: Tue 21-Feb-06 17:15
To: Brian Blais
Cc: python-list@python.org; [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject:Re: [Numpy-discussion] algorithm, optimization, or other
problem?
Hi,
In the current version, note that Y is scalar so replace the squaring
(Y**2) with Y*Y as you do in the dohebb function. On my system
without blas etc removing the squaring removes a few seconds (16.28 to
12.4). It did not seem to help factorizing Y.
Also, eta and tau are constants so define them only once as scalars
outside the loops and do the division outside the loop. It only saves
about 0.2 seconds but these add up.
The inner loop probably can be vectorized because it is just vector
operations on a matrix. You are just computing over the ith dimension
of X. I think that you could be able to find the matrix version on
the net.
Regards
Bruce
On 2/21/06, Brian Blais <[EMAIL PROTECTED]> wrote:
> Hello,
>
> I am trying to translate some Matlab/mex code to Python, for doing neural
> simulations. This application is definitely computing-time limited, and I
> need to
> optimize at least one inner loop of the code, or perhaps even rethink the
> algorithm.
>The procedure is very simple, after initializing any variables:
>
> 1) select a random input vector, which I will call "x". right now I have it
> as an
> array, and I choose columns from that array randomly. in other cases, I may
> need to
> take an image, select a patch, and then make that a column vector.
>
> 2) calculate an output value, which is the dot product of the "x" and a weight
> vector, "w", so
>
> y=dot(x,w)
>
> 3) modify the weight vector based on a matrix equation, like:
>
> w=w+ eta * (y*x - y**2*w)
>^
>|
>+ learning rate constant
>
> 4) repeat steps 1-3 many times
>
> I've organized it like:
>
> for e in 100: # outer loop
> for i in 1000: # inner loop
> (steps 1-3)
>
> display things.
>
> so that the bulk of the computation is in the inner loop, and is amenable to
> converting to a faster language. This is my issue:
>
> straight python, in the example posted below for 25 inner-loop steps,
> takes 20
> seconds for each outer-loop step. I tried Pyrex, which should work very fast
> on such
> a problem, takes about 8.5 seconds per outer-loop step. The same code as a
> C-mex
> file in matlab takes 1.5 seconds per outer-loop step.
>
> Given the huge difference between the Pyrex and the Mex, I feel that there is
> something I am doing wrong, because the C-code for both should run comparably.
> Perhaps the approach is wrong? I'm willing to take any suggestions! I don't
> mind
> coding some in C, but the Python API seemed a bit challenging to me.
>
> One note: I am using the Numeric package, not numpy, only because I want to
> be able
> to use the Enthought version for Windows. I develop on Linux, and haven't
> had a
> chance to see if I can compile numpy using the Enthought Python for Windows.
>
> If there is anything else anyone needs to know, I'll post it. I put the main
> script,
> and a dohebb.pyx code below.
>
>
> thanks!
>
> Brian Blais
>
> --
> -
>
> [EMAIL PROTECTED]
> http://web.bryant.edu/~bblais
>
>
>
>
> # Main script:
>
> from dohebb import *
> import pylab as p
> from Numeric import *
> from RandomArray import *
> import time
>
> x=random((100,1000))# 1000 input vectors
>
> numpats=x.shape[0]
> w=random((numpats,1));
>
> th=random((1,1))
>
> params={}
> params['eta']=0.001;
> params['tau']=100.0;
> old_mx=0;
> for e in range(100):
>
> rnd=randint(0,numpats,25)
> t1=time.time()
> if 0: # straight python
> for i in range(len(rnd)):
> pat=rnd[i]
> xx=reshape(x[:,pat],(1,-1))
> y=matrixmultiply(xx,w)
> w=w+params['eta']*(y*transpose(xx)-y**2*w);
> th=th+(1.0/params['tau'])*(y**2-th);
> else: # pyrex
> dohebb(params,w,th,x,rnd)
> print time.time()-t1
>
>
> p.plot(w,'o-')
> p.xlabel('weights')
> p.show()
>
>
> #=
>
> # dohebb.pyx
>
> cdef extern from "Numeric/arrayobject.h":
>
>struct PyArray_Descr:
> int type_num, elsize
> char type
>
>ctypedef class Numeric.ArrayType [object PyArrayObject]:
> cdef char *data
> cdef int nd
> cdef int *dimensions, *strides
> cdef object base
> cdef PyArray_Descr *descr
> cdef int flags
>
>
> def dohebb(params,ArrayType w,ArrayTyp
Re: May i customize basic operator (such as 1==3)?
Thank you for your suggestions! From: Steve Holden <[EMAIL PROTECTED]> To: kanchy kang <[EMAIL PROTECTED]> CC: python-list@python.org Subject: Re: May i customize basic operator (such as 1==3)? Date: Wed, 22 Feb 2006 01:44:26 -0500 kanchy kang wrote: many people write test cases with python scripts. in these test scripts, there are many validation statements, for example, in unittest, failUnless(a == b),(a/b may be stringType or intType...) during running test scripts, if there is one exception raised from failUnless, i still do not know a =?, b= ?... i have to add one statment "print a" or "print b" again... as i know, there are many validation statements if using python as one test tool... i think my suggestion or requirement may benefit users greatly... A test framework will contain many tests for equality that have nothing to do with the tests themselves. So the real answer to this problem is to have the tests be more explicit when they need to be. A testEqual(a, b) test function would seem to be a more sensible approach than radical surgery on the interpreter. The function can then print its arguments if they turn out to be unequal. Otherwise there would have to be some *very* selective mechanism to decide when the comparison arguments were printed out. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ _ FREE pop-up blocking with the new MSN Toolbar get it now! http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/ -- http://mail.python.org/mailman/listinfo/python-list
Re: May i customize basic operator (such as 1==3)?
__eq__ method can resolve this problem only for class object. what can i do in the following case? a = somefuction(...) #a is stringType a == "1234"? my simple requirement is: in some validation statments, such as, failUnless(a == "1234") if the result is true, it's OK. otherwise, it prints a automatically. also, i know we can implement failUnless(...) to satisfy this, failUnless(a == b, a, b) but i think, if we can override "==" for any type, it will make things conveniently... regards! >From: Casey Hawthorne <[EMAIL PROTECTED]> >To: python-list@python.org >Subject: Re: May i customize basic operator (such as 1==3)? >Date: Wed, 22 Feb 2006 04:06:34 GMT > >I believe you are asking for a side effect from the "==" operator. > >Add print statements to the __eq__ method. > >"kanchy kang" <[EMAIL PROTECTED]> wrote: > > >Hi,all > >as we know, we can override the operator of one object(for example >__eq__). > >my question is, how to override the basic operator? > >for example, > > > >for any object comparison operator(including litterals), > >for example, > >a = "123" > >b = "321" > > > >the boolean equation a == b, > >i need override "==" operator like this: > >first display a and b > > > >then return real boolean result (a == b). > > > >thanks! > > > > > >--- > >Best regards, > >kangzz > > > >mailto:[EMAIL PROTECTED] > >Tel : 021-65407754 > >MP: 13916928084 > > > >_ > >Express yourself instantly with MSN Messenger! Download today - it's >FREE! > >http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ >-- >Regards, >Casey >-- >http://mail.python.org/mailman/listinfo/python-list _ Express yourself instantly with MSN Messenger! Download today - it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ -- http://mail.python.org/mailman/listinfo/python-list
Re: May i customize basic operator (such as 1==3)?
kanchy kang wrote: > many people write test cases with python scripts. > in these test scripts, there are many validation statements, > for example, in unittest, failUnless(a == b),(a/b may be stringType or > intType...) > > during running test scripts, if there is one exception raised from > failUnless, i still do not know a =?, b= ?... i have to add one statment > "print a" or "print b" again... > > as i know, there are many validation statements if using python as one > test tool... So why don't you just do something like this: self.failUnless(a == b, "%s != %s" % (a,b)) As a bonus, that will only print something if the test fails rather than spewing out a whole bunch of text that's irrelevant when the tests pass. > i think my suggestion or requirement may benefit users greatly... Python will never grow the ability to modify methods on the builtin types. We've discussed several times before, and you can search the archives of this list if you want more information why this is so. -- Robert Kern [EMAIL PROTECTED] "In the fields of hell where the grass grows high Are the graves of dreams allowed to die." -- Richard Harter -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
Peter Hansen <[EMAIL PROTECTED]> wrote: > Nick Craig-Wood wrote: > > luca72 <[EMAIL PROTECTED]> wrote: > > > >> Thanks for your help, but it don't solve the problem. > >> I receive only the echo and full stop. > > > > Try swapping pins 2 and 3 in the lead. > > Anything's possible, but given that in his original post he says it > works when he uses Delphi, it seems unlikely making a change to the > hardware is necessary. Sorry missed that bit! Pyserial works very well in my experience (under linux). Serial ports are generally a pain though ;-) -- Nick Craig-Wood <[EMAIL PROTECTED]> -- http://www.craig-wood.com/nick -- http://mail.python.org/mailman/listinfo/python-list
Re: May i customize basic operator (such as 1==3)?
many people write test cases with python scripts. in these test scripts, there are many validation statements, for example, in unittest, failUnless(a == b),(a/b may be stringType or intType...) during running test scripts, if there is one exception raised from failUnless, i still do not know a =?, b= ?... i have to add one statment "print a" or "print b" again... as i know, there are many validation statements if using python as one test tool... i think my suggestion or requirement may benefit users greatly... best regards! From: Steve Holden <[EMAIL PROTECTED]> To: python-list@python.org Subject: Re: May i customize basic operator (such as 1==3)? Date: Tue, 21 Feb 2006 23:29:30 -0500 kanchy kang wrote: > Hi,all > as we know, we can override the operator of one object(for example __eq__). > my question is, how to override the basic operator? > for example, > > for any object comparison operator(including litterals), > for example, > a = "123" > b = "321" > > the boolean equation a == b, > i need override "==" operator like this: > first display a and b > > then return real boolean result (a == b). > > thanks! This isn't going to be possible without modifying the Python interpreter, as the operators are implemented as methods of objects, and the built-in objects are programmed in C and not in Python. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list _ FREE pop-up blocking with the new MSN Toolbar get it now! http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/ -- http://mail.python.org/mailman/listinfo/python-list
Re: a little more help with python server-side scripting
John Salerno wrote: > Steve Holden wrote: > > >>If the script ran, you will now know waht version of Apaceh you're >>running with! > > > Well, the script did seem to run, but I'm still not sure if this is what > I'm ultimately after. This allows me to run Python script files, which > is good, but what I really want to do is write bits of Python code in my > HTML files (as a means to include headers and footers, for example). So > these bits of Python code will basically be like a PHP include() > function that calls another HTML file which contains the header/footer > HTML to insert into the calling file. This type of situation doesn't > involve calling external Python scripts. > > Maybe I can just try this also and see if it works, but I don't know the > code to use to write such an include statement. What would the > equivalent of this be in Python: > > > > Thanks. There are various ways you can do this, each of which depends on having a particular framework in place. Since your web service provider tells you that mod_python is available it's likely that you'll be able to use PSP (one of several beasts known as "Python Server Pages"). This is briefly described (for a flavor of the technology) in http://www.python.org/pycon/dc2004/papers/14/ by the author of mod_python. If you like what you see then take a look at the full mod_python documentation, at http://www.modpython.org/live/current/doc-html/ Note that purists might suggest this isn't the best way to use Python on the web. If it gets you where you want to be, feel free to ignore them :-) regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: a little more help with python server-side scripting
Steve Holden wrote: > If the script ran, you will now know waht version of Apaceh you're > running with! Well, the script did seem to run, but I'm still not sure if this is what I'm ultimately after. This allows me to run Python script files, which is good, but what I really want to do is write bits of Python code in my HTML files (as a means to include headers and footers, for example). So these bits of Python code will basically be like a PHP include() function that calls another HTML file which contains the header/footer HTML to insert into the calling file. This type of situation doesn't involve calling external Python scripts. Maybe I can just try this also and see if it works, but I don't know the code to use to write such an include statement. What would the equivalent of this be in Python: Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: a little more help with python server-side scripting
Steve Holden wrote:
>> Where does this line go? Just at the top as well?
>
> Nope. I presume you can log in to your web server using ssh or telnet or
> similar. In which case you do so. Then use the commands
>
> cd {wherever}/cgi-bin
> chmod +x test.py
>
> to make the script executable, and therefore recognised as a proper
> script by Apache.
I'm afraid I still don't understand. I guess this step isn't necessary,
since the script seemed to run anyway, but I'd like to know this anyway.
The way I log into my server space is by an FTP program, so I don't see
an occasion to actually *type* in any kind of commands.
--
http://mail.python.org/mailman/listinfo/python-list
Re: a little more help with python server-side scripting
John Salerno wrote: > Steve Holden wrote: > > >>Fortunately they've given you the information you need to run CGI >>scripts. Try installing this script in your cgi-bin directory as test.py >>(you may have to set it executable): > > > Thank you! I desperately needed to test it, and that seemed to work. I > didn't have to make it executable though. I wonder why? Probably because the cgi-bin directory is specially marked to contain executables. If you drop the script in another directory you will almost certainly just see the source of the script. Making it executable *might* cause it to run, but that would depend on exactly how your server is configured. Certainly my sites all have a line like ScriptAlias /cgi-bin/ "c:/apache/cgi-bin/" in the httpd.conf file. ScriptAlias tells Apache that the files in the directory are scripts. The first argument is the address in web-space, the second the address on disk. You'll find you can affect *some* configuration items by creating files called .htaccess in your web content directories, but that's a ways down the road yet. If the script ran, you will now know waht version of Apaceh you're running with! regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: What are COM-enabled applications?
COM is Windows only. (Actually there is DCOM for Linux, but that's another story). Read about it here. http://en.wikipedia.org/wiki/Component_object_model -- http://mail.python.org/mailman/listinfo/python-list
Re: Basic coin flipper program - logical error help
<[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > > John Zenger wrote: > > Also, with the functional programming tools of map, filter, and lambda, > > this code can be reduced to just six lines: > > > > import random > > > > flips = map(lambda x: random.randrange(2), xrange(100)) > > heads = len(filter(lambda x: x is 0, flips)) > > tails = len(filter(lambda x: x is not 0, flips)) > > Or a filter/map/lambda free way: > > heads = sum(random.randrange(2) for x in xrange(100)) > tails = 100 - heads > sort, then groupby. import itertools import random h,t = [len(list(g)) for k,g in itertools.groupby(sorted([random.randrange(2) for i in xrange(100)]))] print h,t -- http://mail.python.org/mailman/listinfo/python-list
Re: Basic coin flipper program - logical error help
John Zenger wrote: > Also, with the functional programming tools of map, filter, and lambda, > this code can be reduced to just six lines: > > import random > > flips = map(lambda x: random.randrange(2), xrange(100)) > heads = len(filter(lambda x: x is 0, flips)) > tails = len(filter(lambda x: x is not 0, flips)) Or a filter/map/lambda free way: heads = sum(random.randrange(2) for x in xrange(100)) tails = 100 - heads -- http://mail.python.org/mailman/listinfo/python-list
Re: May i customize basic operator (such as 1==3)?
kanchy kang wrote: > Hi,all > as we know, we can override the operator of one object(for example __eq__). > my question is, how to override the basic operator? > for example, > > for any object comparison operator(including litterals), > for example, > a = "123" > b = "321" > > the boolean equation a == b, > i need override "==" operator like this: > first display a and b > > then return real boolean result (a == b). > > thanks! This isn't going to be possible without modifying the Python interpreter, as the operators are implemented as methods of objects, and the built-in objects are programmed in C and not in Python. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: a little more help with python server-side scripting
John Salerno wrote:
> Ben Cartwright wrote:
>
>
>>>The script can be given a executable mode, or permission, using the
>>>chmod command:
>>>
>>> $ chmod +x myscript.py
>>
>>And this answers your second. Your host needs to know the path to your
>>script so they can use chmod to make it executable.
>
>
> Where does this line go? Just at the top as well?
Nope. I presume you can log in to your web server using ssh or telnet or
similar. In which case you do so. Then use the commands
cd {wherever}/cgi-bin
chmod +x test.py
to make the script executable, and therefore recognised as a proper
script by Apache.
regards
Steve
--
Steve Holden +44 150 684 7255 +1 800 494 3119
Holden Web LLC www.holdenweb.com
PyCon TX 2006 www.python.org/pycon/
--
http://mail.python.org/mailman/listinfo/python-list
Re: a little more help with python server-side scripting
Steve Holden wrote: > Fortunately they've given you the information you need to run CGI > scripts. Try installing this script in your cgi-bin directory as test.py > (you may have to set it executable): Thank you! I desperately needed to test it, and that seemed to work. I didn't have to make it executable though. I wonder why? -- http://mail.python.org/mailman/listinfo/python-list
Re: a little more help with python server-side scripting
Ben Cartwright wrote: >> The script can be given a executable mode, or permission, using the >> chmod command: >> >> $ chmod +x myscript.py > > And this answers your second. Your host needs to know the path to your > script so they can use chmod to make it executable. Where does this line go? Just at the top as well? -- http://mail.python.org/mailman/listinfo/python-list
Re: May i customize basic operator (such as 1==3)?
Casey Hawthorne wrote: > I believe you are asking for a side effect from the "==" operator. > > Add print statements to the __eq__ method. The things is, he wants to make those modifications to builtin types, which he can't do. -- Robert Kern [EMAIL PROTECTED] "In the fields of hell where the grass grows high Are the graves of dreams allowed to die." -- Richard Harter -- http://mail.python.org/mailman/listinfo/python-list
Re: May i customize basic operator (such as 1==3)?
I believe you are asking for a side effect from the "==" operator. Add print statements to the __eq__ method. "kanchy kang" <[EMAIL PROTECTED]> wrote: >Hi,all >as we know, we can override the operator of one object(for example __eq__). >my question is, how to override the basic operator? >for example, > >for any object comparison operator(including litterals), >for example, >a = "123" >b = "321" > >the boolean equation a == b, >i need override "==" operator like this: >first display a and b > >then return real boolean result (a == b). > >thanks! > > >--- >Best regards, >kangzz > >mailto:[EMAIL PROTECTED] >Tel : 021-65407754 >MP: 13916928084 > >_ >Express yourself instantly with MSN Messenger! Download today - it's FREE! >http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ -- Regards, Casey -- http://mail.python.org/mailman/listinfo/python-list
Re: a little more help with python server-side scripting
John Salerno wrote: > I contacted my domain host about how Python is implemented on their > server, and got this response: > > --- > Hello John, > > Please be informed that the implementation of python in our server is > through mod_python integration with the apache. > > These are the steps needed for you to be able to run .py script directly > from browser for your webpage: > > 1. Please use the below mentioned path for python: > #!/usr/bin/env python > > Furthermore, update us with the script path, so that we can set the > appropriate ownership and permissions of the script on the server. > > If you require any further assistance, feel free to contact us. > --- > > Unfortunately, I don't completely understand what it is I need to do > now. Where do I put the path they mentioned? And what do they mean by my > script path? Don't worry, it looks as though they don't completely understand either :-) Fortunately they've given you the information you need to run CGI scripts. Try installing this script in your cgi-bin directory as test.py (you may have to set it executable): #!/usr/bin/env python # import os print "Content-Type: text/plain" print for t in os.environ.items(): print "%s=%s" % t If it runs when you access http://yourdomain/cgi-bin/test.py it looks like you're good to go! regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
What are COM-enabled applications?
As the subject of this post suggests, I have one question; what are COM-enabled applications? I believe Microsoft Word is one of these apps, but what else? Is a web browser, Paint, Solitare, games, etc? I'm not sure if it varies from operating system to operating system, but I am talking about COM applications in Windows. Thanks for any and all of your help and time. -- http://mail.python.org/mailman/listinfo/python-list
May i customize basic operator (such as 1==3)?
Hi,all as we know, we can override the operator of one object(for example __eq__). my question is, how to override the basic operator? for example, for any object comparison operator(including litterals), for example, a = "123" b = "321" the boolean equation a == b, i need override "==" operator like this: first display a and b then return real boolean result (a == b). thanks! --- Best regards, kangzz mailto:[EMAIL PROTECTED] Tel : 021-65407754 MP: 13916928084 _ Express yourself instantly with MSN Messenger! Download today - it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ -- http://mail.python.org/mailman/listinfo/python-list
Weekly Python Patch/Bug Summary
Patch / Bug Summary ___ Patches : 385 open (-14) / 3067 closed (+25) / 3452 total (+11) Bugs: 864 open (-59) / 5621 closed (+68) / 6485 total ( +9) RFE : 211 open ( +2) / 200 closed ( +2) / 411 total ( +4) New / Reopened Patches __ GNU uses double-dashes not single (2006-02-16) http://python.org/sf/1433148 opened by splitscreen restrict codec lookup to encodings package (2006-02-16) CLOSED http://python.org/sf/1433198 reopened by lemburg restrict codec lookup to encodings package (2006-02-16) CLOSED http://python.org/sf/1433198 opened by Guido van Rossum add on_missing() and default_factory to dict (2006-02-17) http://python.org/sf/1433928 opened by Guido van Rossum CHM file contains proprietary link format (2006-02-18) http://python.org/sf/1434298 opened by Alexander Schremmer Patch to support lots of file descriptors (2006-02-19) http://python.org/sf/1434657 opened by Sven Berkvens-Matthijsse Add copy() method to zlib's compress and decompress objects (2006-02-20) http://python.org/sf/1435422 opened by Chris AtLee PEP 343 with statement (2006-02-21) http://python.org/sf/1435715 opened by mbland Incremental codecs (2006-02-21) http://python.org/sf/1436130 opened by Walter Dörwald fix inplace assignment for immutable sequences (2006-02-21) http://python.org/sf/1436226 opened by Georg Brandl Patches Closed __ GNU uses double-dashes not single (2006-02-16) http://python.org/sf/1433166 deleted by gvanrossum restrict codec lookup to encodings package (2006-02-16) http://python.org/sf/1433198 closed by lemburg restrict codec lookup to encodings package (2006-02-16) http://python.org/sf/1433198 closed by lemburg use computed goto's in ceval loop (2006-01-18) http://python.org/sf/1408710 closed by loewis have SimpleHTTPServer return last-modified headers (2006-01-28) http://python.org/sf/1417555 closed by birkenfeld Feed style codec API (2005-01-12) http://python.org/sf/1101097 closed by lemburg chunk.py can't handle >2GB chunks (2005-12-05) http://python.org/sf/1373643 closed by birkenfeld Fix of bug 1366000 (2005-11-30) http://python.org/sf/1370147 closed by birkenfeld Optional second argument for startfile (2005-12-29) http://python.org/sf/1393157 closed by birkenfeld Clairify docs on reference stealing (2006-01-26) http://python.org/sf/1415507 closed by birkenfeld urllib proxy_bypass broken (2006-02-07) http://python.org/sf/1426648 closed by birkenfeld Speed up EnumKey call (2004-06-22) http://python.org/sf/977553 closed by birkenfeld [PATCH] Bug #1351707 (2005-11-10) http://python.org/sf/1352711 closed by birkenfeld fileinput patch for bug #1336582 (2005-10-25) http://python.org/sf/1337756 closed by birkenfeld Fix for int(string, base) wrong answers (2005-10-22) http://python.org/sf/1334979 closed by birkenfeld [PATCH] 100x optimization for ngettext (2005-11-06) http://python.org/sf/1349274 closed by birkenfeld commands.getstatusoutput() (2005-11-02) http://python.org/sf/1346211 closed by birkenfeld two fileinput enhancements (fileno, openhook) (2005-06-05) http://python.org/sf/1215184 closed by birkenfeld mode argument for fileinput class (2005-05-31) http://python.org/sf/1212287 closed by birkenfeld do not add directory of sys.argv[0] into sys.path (2004-05-02) http://python.org/sf/946373 closed by gbrandl prefix and exec_prefix as root dir bug (2004-04-08) http://python.org/sf/931938 closed by gbrandl New / Reopened Bugs ___ optparse docs double-dash confusion (2006-02-16) http://python.org/sf/1432838 opened by John Veness Logging hangs thread after detaching a StreamHandler's termi (2006-02-13) CLOSED http://python.org/sf/1431253 reopened by yangzhang os.path.expandvars sometimes doesn't expand $HOSTNAME (2006-02-17) CLOSED http://python.org/sf/1433667 opened by Doug Fort normalize function in minidom unlinks empty child nodes (2006-02-17) http://python.org/sf/1433694 opened by RomanKliotzkin string parameter to ioctl not null terminated, includes fix (2006-02-17) http://python.org/sf/1433877 opened by Quentin Barnes pointer aliasing causes core dump, with workaround (2006-02-17) http://python.org/sf/1433886 opened by Quentin Barnes Python crash on __init__/__getattr__/__setattr__ interaction (2004-04-26) CLOSED http://python.org/sf/942706 reopened by hhas Crash when decoding UTF8 (2006-02-20) CLOSED http://python.org/sf/1435487 opened by Viktor Ferenczi CGIHTTPServer doesn't handle path names with embeded space (2006-02-21) http://python.org/sf/1436206 opened by Richard Coupland Bugs Closed ___ Logging hangs thread af
Re: Python vs. Lisp -- please explain
Torsten Bronger wrote: > > My definiton would be that an interpreted language has in its > typical implementation an interpreting layer necessary for typical > hardware. Of couse, now we could discuss what is "typical", > however, in practice one would know it, I think. In case of Python: > CPython and all important modern processors. In a previous century, I used something called UCSD Pascal, which at the time was a typical implementation of Pascal. It ran on (amongst other things) an Apple ][, which at the time was typical hardware. It worked by compiling Pascal source to bytecode (called p-code), and interpreting the p-code. So, in practice, one would know that Pascal was an interpreted language. Later on, I used a typical implementation called VAX Pascal: a compiler reduced Pascal source to VAX object code. In practice, Pascal was not an interpreted language. Of course, more than one of the VAXen we had did not implement the entire VAX instruction set, and some instructions were emulated, or interpreted, if you will, by other VAX instructions. So, in practice, some of the Pascal was interpreted. And, as someone in this thread has pointed out, it is likely that your important modern (x86) processor is not natively executing your x86 code, and indeed meets your definition of having "in its typical implementation an interpreting layer necessary for typical hardware". Another example: is Java the bytecode, which is compiled from Java the language, interpreted or not? Even when the HotSpot JIT cuts in? Or when a native Java processor is used? Or when your Java program is compiled with GCJ (if GCJ does what I think it does)? Does this make Java an interpreted language or not? Personally, in practice I don't care, so don't ask me. Ponder on getting angels to dance on the head of a pin before you worry about whether the dance can be interpreted or not. PJDM -- http://mail.python.org/mailman/listinfo/python-list
Re: Basic coin flipper program - logical error help
wes weston wrote: >Looping is easier with: > for x in range(100): >if random.randint(0,1) == 0: > heads += 1 >else: > tails += 1 Also, with the functional programming tools of map, filter, and lambda, this code can be reduced to just six lines: import random flips = map(lambda x: random.randrange(2), xrange(100)) heads = len(filter(lambda x: x is 0, flips)) tails = len(filter(lambda x: x is not 0, flips)) print "The coin landed on heads", heads, "times." print "The coin landed on tails", tails, "times." -- http://mail.python.org/mailman/listinfo/python-list
Re: a little more help with python server-side scripting
John Salerno wrote:
> I contacted my domain host about how Python is implemented on their
> server, and got this response:
>
> ---
> Hello John,
>
> Please be informed that the implementation of python in our server is
> through mod_python integration with the apache.
>
> These are the steps needed for you to be able to run .py script directly
> from browser for your webpage:
>
> 1. Please use the below mentioned path for python:
> #!/usr/bin/env python
>
> Furthermore, update us with the script path, so that we can set the
> appropriate ownership and permissions of the script on the server.
>
> If you require any further assistance, feel free to contact us.
> ---
>
> Unfortunately, I don't completely understand what it is I need to do
> now. Where do I put the path they mentioned? And what do they mean by my
> script path?
The Python tutorial should fill in the blanks
(http://www.python.org/doc/tut/node4.html):
> 2.2.2 Executable Python Scripts
>
> On BSD'ish Unix systems, Python scripts can be made directly executable,
> like shell scripts, by putting the line
>
> #! /usr/bin/env python
>
> (assuming that the interpreter is on the user's PATH) at the beginning
> of the script and giving the file an executable mode. The "#!" must be
> the first two characters of the file. On some platforms, this first line
> must end with a Unix-style line ending ("\n"), not a Mac OS ("\r") or
> Windows ("\r\n") line ending. Note that the hash, or pound, character,
> "#", is used to start a comment in Python.
This answers your first question. Put the #! bit at the top of your
.py script. This way the web server will know how to run the script.
> The script can be given a executable mode, or permission, using the
> chmod command:
>
> $ chmod +x myscript.py
And this answers your second. Your host needs to know the path to your
script so they can use chmod to make it executable.
--Ben
--
http://mail.python.org/mailman/listinfo/python-list
Re: odt -> pdf
Katja Suess wrote: > Hi > Cause Google didn't find the Info I was trying to find her my post. > Is PyUNO still _the_ Tool to create PDFs out of OpenOffice docs (odt, > not swx) ? > Do other tools exist? > Do you prefer generatingp PDFs using the XML-Strukture of odt files? > Regards, > Katja > OpenOffice.org 2.0 gives you an Export to pdf capability. Colin W. -- http://mail.python.org/mailman/listinfo/python-list
Re: number ranges
Alex Martelli wrote: > Steven D'Aprano <[EMAIL PROTECTED]> wrote: >... > >>>Reread the part I quoted above: at least some of the proponents of this >>>syntax appear to be totally ignorant of 30 years of literature and >>>practice of programming, "it will be tough to convince" them that closed >>>intervals are a terrible mistake and semi-open ones the only way to go. >> >>I intellectually understand that semi-open intervals >>are the only way to go. But reading the words, the part >>of my brain that speaks English cries out for a closed >>interval. Bad brain. > > > Human brain -- it's harder for non-native-speakers like me to judge the > associations of certain English words in a native speaker's brain. > > >>Given the overwhelming benefit of semi-closed >>intervals, I wish to amend my proposal to follow Alex's >>suggestions, namely: >> >>for i in (1 to 10 by 3): >> print i >> >>should print 1 4 7. > > > But that would be an "attractive nuisance" to many other native speakers > like you, who would instinctively think of a closed interval. Maybe > 'upto' rather than 'to', as somebody else suggested, would ease that. > > >>That would make (a to b by c) equivalent to >>range(a,b,c) except that it returns an iterator rather >>than a list. Hmmm... putting it that way, the new >>syntax actually costs 1 keystroke, or saves 1 if you >>put spaces after the commas in the range expression. >>Does it add enough clarity and ease of understanding to >>justify two new keywords? > > > No, of course not. And if we use upto, we'll need a downto as well, a > third keyword, for loops with negative step. range should return an > iterator in Python 3.0 (maybe in 2010?-) and xrange will then go away, > so the only issue is whether syntax sugar for it is SO badly needed as > to justify 2/3 new keywords. > > >>>whines about it); Python is clearly much better off if such people run >>>away to Ruby, with its (expletive deleted) a..b AND a...b syntaxes just >>>to ensure maximum confusion;-). >> >>Ruby uses both .. and ...? Now I'm frightened. > > > I _like_ Ruby, mostly, but yes, it has both a..b AND a...b, one of them > to indicate a semi-open interval and the other to indicate a closed one > (I believe the three dots are for the semi-open, but it could be the > other way 'round) -- I don't remember how it indicates a step. I do > think this is a wart (lack of visual or mnemonic distinction), though > I'm sure Ruby enthusiasts would not agree. > > > Alex http://www.ruby-doc.org/docs/ProgrammingRuby/ It seems that .. and ... are Range class constructors. Range.new(a, b, exclusive= True) is equivalent to Python's range(a, b) i.e. Ruby's a...b There appears to be no provision for a stride. Ruby's choice between .. and ... seems a little perverse. I would expect '...' to deliver a little more than '..'. I guess one could consider Python's range() as a constructor for the List class. Steven D'Aprano suggested that 1 to 10 by 3 should create an iterator. What are the benefits of this as compared with a Python List? Could we not have 1 ... 10 ... 3 to mean the same thing and then there would be no need for extra reserved words? Colin W. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
Chris Mellon wrote: [snip] > I don't think it does, though. Firstly, as a definition it relies on > the environment the application will be running under and therefore > can't be considered to describe just a language. Secondly, by that > definition Java is an interpreted language which is at odds with the > common definition. > > I've encountered a C scripting environment that works by using GCC to > compile each line as it is encountered, doing some magic to keep a > working compilation environment around. > > Interpreted? Compiled? > There is also the wonderful C interpreter cint: http://root.cern.ch/root/Cint.html so obviously C must be an interpreted language :-) Cheers, Carl Friedrich Bolz -- http://mail.python.org/mailman/listinfo/python-list
Re: Basic coin flipper program - logical error help
Thanks everyone for your insight.
I'm coming from C++ - I'm used to formatting code with {} instead of
whitespaces.
@Larry - this isn't my homework :P I'm actually taking a VB.NET class
in school.
I was teaching myself C++ but decided to scale back to Python. I've
heard it was a bit easier to understand and it cuts your development
time by at least 50% (I've heard 90%).
Logically I can figure things out - its the formatting of the logic in
Python that is messing me up. I'll get it soon enough =)
--
http://mail.python.org/mailman/listinfo/python-list
ANN: Extended Python debugger 0.12
This third release of an improved debugger also probably about as great as the last release. Download from http://sourceforge.net/project/showfiles.php?group_id=61395&package_id=175827 On-line documentation is at http://bashdb.sourceforge.net/pydb/pydb/lib/index.html Along with this release is a version of ddd (3.3.12-test3) that interfaces with this debugger. Get that at: http://sourceforge.net/project/showfiles.php?group_id=61395&package_id=65341 - - - - - - >From the NEWS file. * Add gdb commands: - "cd" command - "display", "undisplay" - help subcommands for "show", "info", and "set" - info: "display", "line" "source" and "program" - "pwd" command - "return" (early exit from a function) - "shell" command - Extend "info line" to allow a function name. * Use inspect module. Argument parameters and values are now shown. * Break out debugger into more files * File location reporting changed. Is now like mdb, bashdb, or (or perldb) * Changes to make more compatible with ddd. * Doc fixes, add more GNU Emacs debugger commands * "clear" command now accepts a function name * Bugfixes: - allow debugged program to mangle sys.argv (we save our own copy) -- http://mail.python.org/mailman/listinfo/python-list
Re: deriving from float or int
gene tani wrote: > Russ wrote: > >>Does it ever make sense to derive a class from a basic type such as >>float or int? Suppose, for example, that I want to create a class for >>physical scalars with units. I thought about deriving from float, then >>adding the units. I played around with it a bit, but it doesn't seem to >>work very well. Am I missing something here? Thanks. > > you could look at how sciPy does it: > http://starship.python.net/~hinsen/ScientificPython/ ScientificPython != SciPy ScientificPython's unit package does not subclass from floats since it tries to be agnostic about the kind of value you can assign a unit to. -- Robert Kern [EMAIL PROTECTED] "In the fields of hell where the grass grows high Are the graves of dreams allowed to die." -- Richard Harter -- http://mail.python.org/mailman/listinfo/python-list
a little more help with python server-side scripting
I contacted my domain host about how Python is implemented on their server, and got this response: --- Hello John, Please be informed that the implementation of python in our server is through mod_python integration with the apache. These are the steps needed for you to be able to run .py script directly from browser for your webpage: 1. Please use the below mentioned path for python: #!/usr/bin/env python Furthermore, update us with the script path, so that we can set the appropriate ownership and permissions of the script on the server. If you require any further assistance, feel free to contact us. --- Unfortunately, I don't completely understand what it is I need to do now. Where do I put the path they mentioned? And what do they mean by my script path? -- http://mail.python.org/mailman/listinfo/python-list
Re: Basic coin flipper program - logical error help
DannyB wrote: > I'm just learning Python. So am I :-) > I've created a simple coin flipper program - > here is the code: > > [source] > #Coin flipper > import random > > heads = 0 > tails = 0 > counter = 0 > > coin = random.randrange(2) > > while (counter < 100): > if (coin == 0): > heads += 1 > counter += 1 > else: > tails += 1 > counter += 1 > > coin = random.randrange(2) This line is you logic error because it's not part of your while loop the coin variables get the result of random.randrange(2) assigned only one time (before the loop). > > > print "\nThe coin landed on heads", heads, "times." > print "\nThe coin landed on tails", tails, "times." > [/source] > > << anyway.>>> > > The program runs - however - it will give me 100 heads OR 100 tails. > Can someone spot the logic error? > > Thanks > > ~Dan > You could changed the program to this it works too and is just as readable (IMHO): #Coin flipper import random heads = 0 tails = 0 counter = 0 # removed random line while (counter < 100): if random.randrange(2):# put random here heads += 1 counter += 1 else: tails += 1 counter += 1 # removed random line print "\nThe coin landed on heads", heads, "times." print "\nThe coin landed on tails", tails, "times." Take my advice with caution I'm also new to this :-) Btw, it is possible that the coins lands on it side if not catched with the hand (yes I have seen it happen) ;-) -- mph -- http://mail.python.org/mailman/listinfo/python-list
Re: Basic coin flipper program - logical error help
DannyB wrote: > I'm just learning Python. I've created a simple coin flipper program - > here is the code: > > [source] > #Coin flipper > import random > > heads = 0 > tails = 0 > counter = 0 > > coin = random.randrange(2) > > while (counter < 100): > if (coin == 0): > heads += 1 > counter += 1 > else: > tails += 1 > counter += 1 > > coin = random.randrange(2) > > > print "\nThe coin landed on heads", heads, "times." > print "\nThe coin landed on tails", tails, "times." > [/source] > > << anyway.>>> > > The program runs - however - it will give me 100 heads OR 100 tails. > Can someone spot the logic error? > > Thanks > > ~Dan > Dan, Looping is easier with: for x in range(100): if random.randint(0,1) == 0: heads += 1 else: tails += 1 Inside the loop you need to "flip" on each pass. You're "flipping" once before the start of the loop now. wes -- http://mail.python.org/mailman/listinfo/python-list
Re: Basic coin flipper program - logical error help
DannyB wrote: > I'm just learning Python. I've created a simple coin flipper program - > here is the code: > > [source] > #Coin flipper > import random > > heads = 0 > tails = 0 > counter = 0 > > coin = random.randrange(2) > > while (counter < 100): > if (coin == 0): > heads += 1 > counter += 1 > else: > tails += 1 > counter += 1 > > coin = random.randrange(2) > > > print "\nThe coin landed on heads", heads, "times." > print "\nThe coin landed on tails", tails, "times." > [/source] > > << anyway.>>> > > The program runs - however - it will give me 100 heads OR 100 tails. > Can someone spot the logic error? > > Thanks > > ~Dan > Looks an awful lot like your homework, but I'll give you a clue. You need to get the your coin tosses inside your loop. Otherwise you only toss the coin once and then loop 100 times with the same value. -Larry Bates -- http://mail.python.org/mailman/listinfo/python-list
Re: Basic coin flipper program - logical error help
DannyB wrote: > I'm just learning Python. I've created a simple coin flipper program - > here is the code: > > [source] > #Coin flipper > import random > > heads = 0 > tails = 0 > counter = 0 > > while (counter < 100): coin = random.randrange(2) Claudio > if (coin == 0): > heads += 1 > counter += 1 > else: > tails += 1 > counter += 1 > > coin = random.randrange(2) > > > print "\nThe coin landed on heads", heads, "times." > print "\nThe coin landed on tails", tails, "times." > [/source] > > << anyway.>>> > > The program runs - however - it will give me 100 heads OR 100 tails. > Can someone spot the logic error? > > Thanks > > ~Dan > -- http://mail.python.org/mailman/listinfo/python-list
Re: deriving from float or int
Russ wrote: > Does it ever make sense to derive a class from a basic type such as > float or int? Suppose, for example, that I want to create a class for > physical scalars with units. I thought about deriving from float, then > adding the units. I played around with it a bit, but it doesn't seem to > work very well. Am I missing something here? Thanks. you could look at how sciPy does it: http://starship.python.net/~hinsen/ScientificPython/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Basic coin flipper program - logical error help
On Tue, 2006-02-21 at 16:14 -0800, DannyB wrote: > I'm just learning Python. I've created a simple coin flipper program - > here is the code: > > [source] > #Coin flipper > import random > > heads = 0 > tails = 0 > counter = 0 > > coin = random.randrange(2) > > while (counter < 100): > if (coin == 0): > heads += 1 > counter += 1 > else: > tails += 1 > counter += 1 > > coin = random.randrange(2) > > > print "\nThe coin landed on heads", heads, "times." > print "\nThe coin landed on tails", tails, "times." > [/source] > > << anyway.>>> > > The program runs - however - it will give me 100 heads OR 100 tails. > Can someone spot the logic error? Yes. Put coin = random.randrange(2) inside the while loop. import random heads = 0 tails = 0 counter = 0 coin = random.randrange(2) while (counter < 100): if (coin == 0): heads += 1 counter += 1 else: tails += 1 counter += 1 coin = random.randrange(2) print "\nThe coin landed on heads", heads, "times." print "\nThe coin landed on tails", tails, "times." -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- http://mail.python.org/mailman/listinfo/python-list
Re: Video.
Many thanks to you All. -- http://mail.python.org/mailman/listinfo/python-list
Re: deriving from float or int
On Tue, 21 Feb 2006 15:01:22 -0600 Robert Kern <[EMAIL PROTECTED]> wrote: > http://www.python.org/2.2.3/descrintro.html#__new__ Curiously, __new__ does not appear in the index of the Python 2.3 language reference! It is fixed in Python 2.4, though -- I just checked. -- Terry Hancock ([EMAIL PROTECTED]) Anansi Spaceworks http://www.AnansiSpaceworks.com -- http://mail.python.org/mailman/listinfo/python-list
Basic coin flipper program - logical error help
I'm just learning Python. I've created a simple coin flipper program - here is the code: [source] #Coin flipper import random heads = 0 tails = 0 counter = 0 coin = random.randrange(2) while (counter < 100): if (coin == 0): heads += 1 counter += 1 else: tails += 1 counter += 1 coin = random.randrange(2) print "\nThe coin landed on heads", heads, "times." print "\nThe coin landed on tails", tails, "times." [/source] <<>> The program runs - however - it will give me 100 heads OR 100 tails. Can someone spot the logic error? Thanks ~Dan -- http://mail.python.org/mailman/listinfo/python-list
Re: interpreting the fractional portion of time.clock() vs time.time() measurements
john peter wrote: > > let's say i'm taking timing measurements in Windows XP > > t1 = time.clock() > ... > t2 = time.clock() > > t3 = t2 - t1 = say, 0.018 > what is the unit of measurement for t3? is it correct to say that t3 = > 18 milliseconds? microseconds? > > what if the timing function used for t1 and t2 was time.time()? is it > still correct to > say that t3 = 18 milliseconds? i kinda know that in Windows, > time.clock() has > higher resolution than time.time(). all i need is millisecond > resolution. which > of these functions would be easier to translate into millisecond units > of measurement? Both return seconds. As the docs say (I believe), however, time.clock() is higher resolution, so you should prefer it on Windows for short intervals (where short is defined as well under 24 hours). I imagine you already know how to convert seconds into milliseconds... -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Video.
Sybren Stuvel wrote: > Dr. Pastor enlightened us with: > >>What environment,library,product should I import or study to >>manipulate cameras, video, fire-wire, avi files? > > > That depends on what you want with it. Without more information I'd > say "transcode" Presumably this, found easily by typing that exact word into Google: http://www.transcoding.org/cgi-bin/transcode -- http://mail.python.org/mailman/listinfo/python-list
redirecting to a content page
I am a new user writing some scripts to store data entered via a browser into a database. I have several content pages, and one "processing" page. A content page often has a form like this: ... And the processing page goes like this: form = cgi.FieldStorage() ## do some work, put data into the db The thing is, processing.py doesn't have any content that I want to display to the user. I would ideally like processing.py to seamlessly send the user back to the content page that it came from, perhaps with some parameter tweaks. Instead, I am having to write intermediate steps like this into processing.py: Return to the page you came from. Please let me know if there's a way to do this, or if my general approach (having such a processing page) is off. Thanks, Shreyas - I did try searching for this in the archive but am not even entirely sure what it is called... -- http://mail.python.org/mailman/listinfo/python-list
With pyMinGW
To use Pyrex, SWIG and the like on a Win2K I have followed this way: http://jove.prohosting.com/iwave/ipython/pyMinGW.html I already had MinGW 3.4.2, so I have decompressed the Python 2.4.2 sources, I have merged in the pyMinGW patch, and I have run the global compilation with: make -f python24.mak all It has compiled most things, but not zlibmodule.c It has stopped the compilation with: c:\..\bin\dllwrap.exe: no export definition file provided. Creating one, but that may not be what you want make[1]: Leaving directory `/.../PyminGW/Python-2.4.2/MinGW' make -f zlib.mak make[1]: Entering directory `/.../PyminGW/Python-2.4.2/MinGW' gcc.exe -c ../Modules/zlibmodule.c -o ../Modules/zlibmodule.o -I"../Include" -I"../Pc" -I"../../../d ist/zlib-1.2.3" -Wall -s -DNDEBUG -D_USRDLL -O2 ../Modules/zlibmodule.c:8:18: zlib.h: No such file or directory ../Modules/zlibmodule.c:66: error: syntax error before "z_stream" ... etc etc. Anyway, probably 98% was compiled and this Python works, I have tried the standard tests and most of them pass. Then I have downloaded the pyMinGW Extensions V. 0.0.6.6, so zip and other things now work. The link to the Tcl-Tkinter extension doesn't work (the free site hosting the file doesn't accept this file format anymore), so I cannot use Tkinter. I have decompressed SWIG and put it in a temporary Path. I have then tried a basic SWIG example, (called example) coming from this obsolete but probably still interesting page: http://sebsauvage.net/python/mingw.html But I have had problems durign the module creation: C:\...\PyminGW\Python-2.4.2\MinGW>python setup.py build -cmingw32 running build running build_ext building 'example' extension swigging example.i to example_wrap.c C:\...\PyminGW\swigwin-1.3.28\swig.exe -python -o example_wrap.c example.i creating build creating build\temp.win32-2.4 creating build\temp.win32-2.4\Release C:\..\bin\gcc.exe -mno-cygwin -mdll -O -Wall -Ic:\python24\include -Ic:\pytho n24\PC -c example_wrap.c -o build\temp.win32-2.4\Release\example_wrap.o example_wrap.c: In function `My_variable_set': example_wrap.c:2550: error: `My_variable' undeclared (first use in this function) ... ecc. So I have had 3 problems, maybe some of you can suggest me how to solve some of them. (Can the standard Python site accept to distribuite an installer with MinGW-compiled Python + minGW + SWIG for people using Windows that want such system prebuilt? Maybe me or another person can assemble it). Thank you, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: Module question
Tuvas wrote: >Could I just do this then? > >from foo import x? > > Yes, you can do it that way. (f you have your modules importing each other in a circular fashion, then this can cause trouble as x may not be defined yet, so best to avoid that case.) >One more question now that I've tried this. In my main function, I have >alot of init code. I don't want this code to be re-ran when the second >module imports the first. Is there any way around this? Thanks! > > > It won't be run twice. Module import is a two phase thing: 1. Read/compile the module and run it, creating a module object. (This is done only once -- the first time a module is imported.) 2. Bind values in the importing code to the module or its attributes. (This is done every time a module is imported.) So... Your init code will be executed once -- in phase 1, no matter how many times an import causes phase two to be performed. Gary Herron -- http://mail.python.org/mailman/listinfo/python-list
Re: Video.
- pymedia: http://www.pymedia.org/ - pyvideo: http://www.geocities.com/rtrocca/python/ (use avisynth) - videocapture: http://videocapture.sourceforge.net/ If you are on Mac, you probably have access to everything by pyobjc. Good luck, Stani -- http://pythonide.stani.be -- http://mail.python.org/mailman/listinfo/python-list
interpreting the fractional portion of time.clock() vs time.time() measurements
let's say i'm taking timing measurements in Windows XP t1 = time.clock() ... t2 = time.clock() t3 = t2 - t1 = say, 0.018what is the unit of measurement for t3? is it correct to say that t3 = 18 milliseconds? microseconds? what if the timing function used for t1 and t2 was time.time()? is it still correct to say that t3 = 18 milliseconds? i kinda know that in Windows, time.clock() has higher resolution than time.time(). all i need is millisecond resolution. which of these functions would be easier to translate into millisecond units of measurement? __Do You Yahoo!?Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter Event Binding Double-click
Tuvas wrote: > I am trying to execute a function with a tkinter event binding double > click. With 2 mouse clicks done quickly, the function should happen, > otherwise, it should not. However, I am noticing that the time that the > event binding of a double-click is quite long, on the order of a second > or so. I am double-clicking twice in a second, and the function is > being executed 3 times, and not just 2. I want to know, is this > controlled by the OS, or by Tkinter? And if by tkinter, is there a way > to change it, and how so? Thanks! > You might need to provide more info and some relevant code. I bind to double click all of the time and it works fine. James -- http://mail.python.org/mailman/listinfo/python-list
RE: Python vs. Lisp -- please explain
Terry Reedy wrote: >>> The the compiler is built into the VM as opposed to a separate tool >>> (like Java) is just an implementation issue. That was me, not Paul - careful with the attributions. Otherwise Paul might think you were trying to ascribe some awful, inaccurate statement to him ;) > The presence of the exec statement and the eval function (which is > used by the input statement) requires the runtime presence of the > parser-compiler. Removing the latter disables the former features. > This is legitimite when not needed or when space is tight, but the > result is no longer a full implementation. True - but there's no reason that exec and eval couldn't hand off to a python compiler to do the work. Failure to distribute the compiler would mean then that exec and eval wouldn't work - but everything else would. It's similar to why some projects need the JDK rather than the JRE - they have to be able to compile things on the fly. Tim Delaney -- http://mail.python.org/mailman/listinfo/python-list
Re: Module question
Most of these are indeed independed of Tkinter, except for a status report message that is often sent in response. I' have a few small files already that do this, however, I would ike to be able to put several that do in fact need to post status messages as well. There are about 2400 lines of code in the main module right now, and about 1000 in smaller modules, but I would like to move some more, the problem is, most of the function in my tkinter function use somehow the master tk() variable. I don't know if there's any way around it or not, just trying to find a way. Mine is a somewhat unusual program wherein that the majority of the funcionality is in fact as a GUI, it mostly runs programs from other mediums, it controls an external device, so there isn't much in the line of real gruntwork that the program does. Thanks for the help! -- http://mail.python.org/mailman/listinfo/python-list
Re: Exiting os.spawnv's subroutine
My code is below. As a single script there is no pause at the end of
the processing as there is with using os.spawnv... I am using the
P_WAIT value, and wonder if it is responsible for the extra time at the
end of each iteration. Could it take longer for the processing to be
"successful" when run under os.spawnv? Is there a way to manually send
a "success" exit code back to os.spawnv, rather than waiting for it?
Thanks.
Main script:
# Import subprocess modules
import os, sys, win32com.client
# Define arguments for subprocess
pyPath = "C:\\Python21\\python.exe"
contourScript = "C:\\Ian\\Python scripts\\subProcess2.py"
workspace = "D:\\GIS\\Test"
# Get a list of IMG files in the workspace for Contouring
filenames = os.listdir(workspace)
filenames = [filename.lower()
for filename in filenames
if (filename[-4:].lower() == ".img" and filename[0:2] != "h_" )]
for filename in filenames:
# Define filenames
print "Filename is " + filename
inImg = workspace + "\\" + filename
outContour50 = workspace + "\\contour50_" + filename[:-4] + ".shp"
outContour100 = workspace + "\\contour100_" + filename[:-4] +
".shp"
outContour200 = workspace + "\\contour200_" + filename[:-4] +
".shp"
outContour500 = workspace + "\\contour500_" + filename[:-4] +
".shp"
# Create parameter list
parameterList = []
# First parameter is the name of the Python executable
parameterList.append('python.exe')
# Second parameter is the full path of the Python script
parameterList.append(contourScript)
# The following parameters are the arguments for the Batch script
parameterList.append(inImg)
parameterList.append(outContour50)
parameterList.append(outContour100)
parameterList.append(outContour200)
parameterList.append(outContour500)
# Run subprocess
os.spawnv(os.P_WAIT, pyPath, parameterList)
print "All done!"
Secondary script:
# Import system modules
import sys, win32com.client
# Create the geoprocessor object
gp = win32com.client.Dispatch("esriGeoprocessing.GpDispatch.1")
# Confirm license availability
print "ArcInfo license is " + str(gp.CheckProduct("ArcInfo"))
gp.SetProduct("ArcInfo")
gp.CheckOutExtension("Spatial")
# Set arguments to be passed to main script
inImg = sys.argv[1]
outContour50 = sys.argv[2]
outContour100 = sys.argv[3]
outContour200 = sys.argv[4]
outContour500 = sys.argv[5]
badImgList = []
try:
# For each IMG file, contour at 50, 100, and 200 meter intervals
gp.Contour_sa(inImg, outContour50, "50", "0", "1")
print "Successfully contoured at 50 meter interval!"
gp.Contour_sa(inImg, outContour100, "100", "0", "1")
print "Successfully contoured at 100 meter interval!"
gp.Contour_sa(inImg, outContour200, "200", "0", "1")
print "Successfully contoured at 200 meter interval!"
gp.Contour_sa(inImg, outContour500, "500", "0", "1")
print "Successfully contoured at 500 meter interval!"
except:
badImgList.append(filename)
print filename + " is no good! It's been added to the list!"
--
http://mail.python.org/mailman/listinfo/python-list
Re: Video.
Thank you Sybren. Where is it? Regards. -- http://mail.python.org/mailman/listinfo/python-list
Re: deriving from float or int
Russ enlightened us with: > The problem is that when I derive a new class from float, the darn > thing won't let me create a constructor that accepts more than one > argument. Use __new__, not __init__. It's the function that's called when a new immutable object is created. 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: Video.
Dr. Pastor enlightened us with: > What environment,library,product should I import or study to > manipulate cameras, video, fire-wire, avi files? That depends on what you want with it. Without more information I'd say "transcode" 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: Module question
Tuvas wrote: > I know this is probably a very simple question, but I am building a > program that is now at about 2400 lines of code in the main module. I > need to break it up, however, there are certain variables that I would > like to use among all of them, namely the TKinter background. It's > build using tkinter, so, to do anything useful requires having the > master=Tk() variable portable in every interface. I can't just pass > this variable, the real way to do it is to have a global variable. How > can I do this? Thanks! You don't say what the program does, but try to identify code that does the actual work and put it in separate modules that implement a data model or business logic for the program. These modules should be independent of Tkinter. Kent -- http://mail.python.org/mailman/listinfo/python-list
Re: Jython Pythonpath question
Mark Fink wrote: > Hi there, > > I have a source file FailFixture.py in the folder > D:\AUT_TEST\workspace\JyFIT\testutil. Now I want to import the file > with "import testutil.FailFixture". Unfortunately I could not figure > out how to set this up. I am convinced that > "D:\AUT_TEST\workspace\JyFIT" should be included in the pythonpath but > it does not work. Nor does it work to include this path in the java > classpath. Any idea whats wrong? Do you have a file D:\AUT_TEST\workspace\JyFIT\testutil\__init__.py ? Kent -- http://mail.python.org/mailman/listinfo/python-list
Re: Module question
Could I just do this then? from foo import x? One more question now that I've tried this. In my main function, I have alot of init code. I don't want this code to be re-ran when the second module imports the first. Is there any way around this? Thanks! -- http://mail.python.org/mailman/listinfo/python-list
Video.
Dear All: (I am a 100% beginner in Python.) What environment,library,product should I import or study to manipulate cameras, video, fire-wire, avi files? Thanks you for any guidance. -- http://mail.python.org/mailman/listinfo/python-list
Re: Module question
Tuvas wrote: > I know this is probably a very simple question, but I am building a > program that is now at about 2400 lines of code in the main module. I > need to break it up, however, there are certain variables that I would > like to use among all of them, namely the TKinter background. It's > build using tkinter, so, to do anything useful requires having the > master=Tk() variable portable in every interface. I can't just pass > this variable, the real way to do it is to have a global variable. How > can I do this? Thanks! I will write an example with comments: # say, this is a file/module foo x = 1 # this is our variable # end of module foo -- # other module, where x is needed import foo foo.x # here you have it # end -- It is all simple, but you need to have proper hierarchical import-ing. You are splitting a file, which has a hierarchical order (count lines), so writting proper importing is possible at least in principle. Mikalai -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
On Tue, 21 Feb 2006 09:46:27 -0800, Donn Cave wrote: > In article <[EMAIL PROTECTED]>, > Steven D'Aprano <[EMAIL PROTECTED]> wrote: > ... >> Hey Donn, here is a compiled program for the PowerPC, >> or an ARM processor, or one of IBM's Big Iron >> mainframes. Or even a Commodore 64. What do you think >> the chances are that you can execute it on your >> x86-compatible PC? It's compiled, it should just >> work!!! Right? >> >> No of course not. If your CPU can't interpret the >> machine code correctly, the fact that the code is >> compiled makes NO difference at all. [snip for brevity] > Sure, all this is true, except for the term "interpreter." > You would surely not use the word that way, unless you > just didn't want to communicate. Do you honestly believe that the CPU doesn't have to interpret the machine code, or are you just deliberately playing silly buggers with language? In modern CPUs, there is an intermediate layer of micro-code between the machine code your C compiler generates and the actual instructions executed in hardware. But even if we limit ourselves to obsolete hardware without micro-code, I ask you think about what an interpreter does, and what the CPU does, in the most general way possible. Both take a stream of instructions. Both have to take each instruction, and execute it. In both cases the link between the instruction and the effect is indirect: for example, the machine code 0101 on the Zilog Z80 processor causes the CPU to decrement the B processor register. In assembly language this would be written as DEC B. There is absolutely nothing fundamental about the byte value 5 that inherently means "decrement B processor register". In other words, machine language is a language, just like it says, and like all languages, it must be interpreted. > Your paragraph above that starts with "No of course not", > even omits a point that everyone understands, you can in > fact expect a .py file will work independent of machine > architecture - like any interpreted language. Amazing. In your previous post you were telling everybody how the *disadvantage* of interpreted programs is that they won't run unless the interpreter is present, and in this post you are telling us that interpreted languages will just work. What happened to the requirement for an interpreter? Let's see you run that Python program on a Zilog Z80 without a Python interpreter. Can't be done. No interpreter, whether in hardware or software, and the program won't run, whether in source code or byte code or machine code. If I allow that the machines have an interpreter, perhaps you'll return the favour and install an interpreter for machine language (often called an emulator). Now your compiled C or Lisp code also will run independent of machine architecture. In order to force "interpreted language" and "compiled language" into two distinct categories, rather than just two overlapping extremes of a single unified category, you have to ignore reality. You ignore interpreted languages that are compiled, you ignore the reality of how machine code is used in the CPU, you ignore the existence of emulators, and you ignore virtual machines. > We all know > what native code compilation buys you and what it doesn't. Did you fail to learn *anything* from my parable of interpreted Lisp on a Macintosh II running faster than compiled Lisp running on a Mac II fitted with a Lisp processor? -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Module question
I know this is probably a very simple question, but I am building a program that is now at about 2400 lines of code in the main module. I need to break it up, however, there are certain variables that I would like to use among all of them, namely the TKinter background. It's build using tkinter, so, to do anything useful requires having the master=Tk() variable portable in every interface. I can't just pass this variable, the real way to do it is to have a global variable. How can I do this? Thanks! -- http://mail.python.org/mailman/listinfo/python-list
Re: number ranges
[Lots of proposals snipped] 90% of my gripes with range disappeared with the addition of enumerate. However, if there's going to be another round of range literal proposals I might as well throw out what seems (to me anyway) like the only halfway obvious choice in the context of Python. 1. a:b:c is equivalent to slice(a,b,c) with the usual rules that missing values are mapped to None: Parentheses would be required where this construct would otherwise be ambiguous. 2. slice(a,b,c) grows an __iter__ method that returns a generator that produces an appropriate sequence of integers. This is easy to define for positive steps, but tricky for negative steps (more on that in a second). Thus: for i in (1::2): print i, => 1 3 5 ... and for i in (:10:3): print i, => 0 3 6 9 The tricky part is deciding what to with negative steps when the start is undefined. It's tempting to use 0 as the start, but I think -1 is actually better if slightly odd. The reason is that I think the following invariant should hold. newlist = [] for i in someslice: try: newlist.append(origlist[i]) except IndexError: break assert(newlist == origlist[slice]) For that to work out, you want: for i in (::-2): print i, => -1 -3 -5 ... etc. I realize that this is quite similar to the rejected PEP 204 syntax, but the addition of generators has reduced many of the problems that that PEP had. I have no great need for range literals, but it seems that if there were to be one, one that fit together with the existing syntax would be better than making up something new. -tim -- http://mail.python.org/mailman/listinfo/python-list
Re: jython socket sendall
I used send instead. This should work. -Mark -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
> As they say, case is the difference between "I helped my > Uncle Jack off a horse" and "I helped my uncle jack off a horse." Hahaha!... never heard of that though -- http://mail.python.org/mailman/listinfo/python-list
Re: why does close() fail miserably on popen with exit code -1 ?!
Jeffrey Schwab wrote: > _PyPclose returns the exit status of the popened process (the popenee?), > or -1 on error. Of course, if the status is supposed to be -1, there's > some confusion. yes, that's what i thought the root of the problem is. > In the snippet of code below (from Modules/posixmodule.c), result has > been initialized to the output of fclose, which in your case is 0. The > comment is particularly handy. > ... > /* Indicate failure - this will cause the file object >* to raise an I/O error and translate the last >* error code from errno. We do have a problem with >* last errors that overlap the normal errno table, >* but that's a consistent problem with the file object. >*/ the piece you quoted is from the unix #ifdef part, i think. there is another version of the pypclose for windows below that. in any event i think such behaviour is a bug - just because in unix exit codes are limited to 0..255 (and returned multiplied by 256) doesnt mean other OSes should suffer because of design flow in _PyPclose, right? throwing an IOError "no error" doesnt help. is there a bug database for python where i can check if this was discussed? -- http://mail.python.org/mailman/listinfo/python-list
Jython Pythonpath question
Hi there, I have a source file FailFixture.py in the folder D:\AUT_TEST\workspace\JyFIT\testutil. Now I want to import the file with "import testutil.FailFixture". Unfortunately I could not figure out how to set this up. I am convinced that "D:\AUT_TEST\workspace\JyFIT" should be included in the pythonpath but it does not work. Nor does it work to include this path in the java classpath. Any idea whats wrong? I experiented a little at the Jython prompt: D:\AUT_TEST>java -Dpython.home=D:\AUT_TEST\Jython21 -Dpython.path=D:\AUT_TEST\workspace\JyFIT -classpath D:\AUT_TEST\Jython21\jython.jar;D:\AUT_TEST\JavaLib\log4j-1.2.13.jar;D:\AUT_TEST\workspace\JyFIT org.python.util.jython Jython 2.1 on java1.5.0_06 (JIT: null) Type "copyright", "credits" or "license" for more information. >>> import testutil.FailFixture Traceback (innermost last): File "", line 1, in ? ImportError: No module named FailFixture >>> ^Z -- http://mail.python.org/mailman/listinfo/python-list
Re: Zope/Plone - Is it the right solution?
kbperry a écrit : > Well, > I guess our main goal in this class is to improve usability and user > experiences at the site. > > While we want to improve our site visually and make it more usable to > the prospective students, the site needs to be easily updated. I don't > think that I am looking for a wiki. Don't overlook this solution. A wiki can be made good-looking, and you just can't beat it when it comes to ease of use for non-technical persons (and for technical persons too...). Modern wikis like MoinMoin or the Wiki part of Trac are also very extensibles. For the record, for our own extranet, we're actually switching from CPS (a very-close-to-Plone CMF) to... Trac - there's not even a subversion repository around, but we use the Wiki/Ticket/Roadmap combo to manage our current projects. Now Plone is a pretty good CMS for Portal-like sites, so it may be what you're looking for... -- http://mail.python.org/mailman/listinfo/python-list
Re: number ranges
[EMAIL PROTECTED] (Alex Martelli) writes: > > for i in (1 to 10 by 3): > > print i > > > > should print 1 4 7. > > But that would be an "attractive nuisance" to many other native speakers > like you, who would instinctively think of a closed interval. Maybe > 'upto' rather than 'to', as somebody else suggested, would ease that. I don't think "upto" is any better. Any distinction that might exist between "to" and "upto" doesn't jump out at me. I notice that Haskell uses closed intervals: [1..5] means [1,2,3,4,5]. Is that an error by Haskell's designers? One possibility is that those intervals don't actually get used in ways likely to cause one-off errors. I haven't used Haskell enough to have any sense of this. Here's something ugly but explicit, somewhat Haskell-inspired: (1 .. )# infinite generator, like Haskell (1 .. < 10) # semi-closed interval: 1,2,3...,9 (1 .. <= 10) # closed interval: 1,2,3...,10 (1,4 .. < 10) # semi-closed: 1,4,7 (1,4, .. <= 10) # closed: 1,4,7,10 This would be horrible for Python though. -- http://mail.python.org/mailman/listinfo/python-list
Re: deriving from float or int
Russ wrote: > The problem is that when I derive a new class from float, the darn > thing won't let me create a constructor that accepts more than one > argument. I need two arguments: one for the numerical value and one for > the units. But when I try to give the constructor two arguments, I get > this when I call the constructor: > > TypeError: float() takes at most 1 argument (2 given) > > In other words, python doesn't seem to want to let me "extend" the > float type. I don't understand the reason for that, but I assume there > is a reason. http://www.python.org/2.2.3/descrintro.html#__new__ -- Robert Kern [EMAIL PROTECTED] "In the fields of hell where the grass grows high Are the graves of dreams allowed to die." -- Richard Harter -- http://mail.python.org/mailman/listinfo/python-list
Re: deriving from float or int
The problem is that when I derive a new class from float, the darn thing won't let me create a constructor that accepts more than one argument. I need two arguments: one for the numerical value and one for the units. But when I try to give the constructor two arguments, I get this when I call the constructor: TypeError: float() takes at most 1 argument (2 given) In other words, python doesn't seem to want to let me "extend" the float type. I don't understand the reason for that, but I assume there is a reason. -- http://mail.python.org/mailman/listinfo/python-list
Tkinter Event Binding Double-click
I am trying to execute a function with a tkinter event binding double click. With 2 mouse clicks done quickly, the function should happen, otherwise, it should not. However, I am noticing that the time that the event binding of a double-click is quite long, on the order of a second or so. I am double-clicking twice in a second, and the function is being executed 3 times, and not just 2. I want to know, is this controlled by the OS, or by Tkinter? And if by tkinter, is there a way to change it, and how so? Thanks! -- http://mail.python.org/mailman/listinfo/python-list
Re: In need of a virtual filesystem / archive
Thanks for all the suggestions! I realized a few minutes after I posted that a database would work.. I just wasn't in that "mode" of thinking when I posted. PyTables also looks very interesting, especially because apparently I can read a file in the archive like a normal python file, ie one line at a time. Could I do the same using SQL? I'm assuming I would get the whole file back when I did my SELECT statement. I guess I could chunk the file out and store it in multiple rows, but that sounds complicated. -- http://mail.python.org/mailman/listinfo/python-list
Re: That's really high-level: bits of beautiful python
Max wrote:
> But today we were discussing the problem of running externally-provided
> code (e.g. add-on modules). Neither of us knew how to do it in C, though
> I suggested using DLLs. However, I quickly installed python on his
> laptop and coded this:
>
> exec "import %s as ext_mod" % raw_input("Module: ")
> ext_mod.do()
Be careful with this - its fine for developer only use, but I'd avoid it
in production code. You leave the possibility for hackers to try to
import the module named 'os; os.system('rm -rf /'); import', or other
such deviousness.
Probably a better version:
ext_mod_name = raw_input("Module: ")
ext_mod = __import__(ext_mod_name, globals(), locals(), ['__dict__'])
ext_mod.do()
But granted, it's less cool than the original.
P.S. The ", globals(), locals(), ['__dict__']" is there so that the
proper thing is done when you provide the code with a dotted module name.
--
http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
Chris Mellon wrote: [...] > Torstens definition isn't useful for quantifying a difference between > interpeted and compiled - it's a rough sort of feel-test. It's like > how much of a naked body you can expose before before it changes from > art to pornography - it's not something that is easily quantified. > [...] Possibly, but if your aim is exposing as much flesh as possible without being labeled pornography I think I'd conclude you were in the pornography business from the start, albeit masquerading as an "art dealer". regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Mutable numbers
Suresh Jeevanandam wrote: > # I am new to python. [...] > In any application most of the operation is numerical. So, i think, we > should get a good speed advantage with the availability of mutable > numbers. What do you think ? If you are new to Python, I think you should try to learn how to use it well, and rest assured that the smart people who have been working on it for 15 years have done a pretty good job at making it perform well, with respect to the basic design decisions. Runtime performance has never been the prime goal for Python. It's always been more important with clarity, easy of use and programmer productivity. CPUs get faster and faster, but programmers don't get smarter and smarter... Still, it's quite possible to write very capable programs in Python. For intense number crunching, it's often helpful to use some good library written in C though, whether it's NumPy or some cryptographic library. -- http://mail.python.org/mailman/listinfo/python-list
Re: No
Aye, but the file is in MY drive, not the server. Perhaps thats the issue? I bet it's so... how should i deal with it? Perhaps should be a script that uploads the files to the server and then emails it... i believed this was handled using the root in my PC, but now i see this is not correct. Now i need a script for uploading the files from MY pc and then use the sendmail thingie. Any tips about that script? -- http://mail.python.org/mailman/listinfo/python-list
Re: Zope/Plone - Is it the right solution?
Rene and Tim, Thanks for the help! I am glad that I didn't rule out Plone yet because I was able to download and install quickly. My "site" was up and running very quickly. For this class we are more focused on the HCI/usability stuff than we are the coding. I have plenty of other classes that focus on the coding. I am hoping that we could build an extension or two using python (if needed), and I would like to completely redesign the main "skin," but other than that I need the CMS tool so Plone looks like a great fit. I tried installing Zope last night, but when I did, I couldn't find out how to even start it for about an hour after searching. I was worried that if I went the Plone/Zope route, then I would need to know both. It looks like Plone just makes Zope much easier to work with. -- http://mail.python.org/mailman/listinfo/python-list
Re: No
Fredrik Lundh wrote: > "Gaz" wrote: > > >>OSError: [Errno 2] No such file or directory: 'c:/' >> args = (2, 'No such file or directory') >> errno = 2 >> filename = 'c:/' >> strerror = 'No such file or directory' >> >>Crazy... and if i use c:\, i get a 500 error. > > > that's probably because "c:\" is a syntax error: > > "c:\" > > File "", line 1 > "c:\" > ^ > SyntaxError: EOL while scanning single-quoted string > > but since you're getting a "500 error" instead, it sure sounds like you > forgot to tell us *how* you're running your scripts... (server, platform, > python version, etc). > The 500 error's almost certainly because the script is failing before it emits anything on standard output (I'm presuming that the syntax error will appear on standard error, without having checked ...). regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: editor for Python on Linux
pida is a great ide as well: http://pida.vm.bytemark.co.uk/projects/pida -- http://mail.python.org/mailman/listinfo/python-list
Re: message
Nina Almaguer wrote: > Hi, > We are a web integration firm in Reston, VA and would like to post the > following developer position (I have already joined the group). > > > > When you begin your career at Siteworx, you’ll be part of a rapidly > growing software and services company. In fact, you have probably > visited some of our web applications and sites already – many are for > companies with household names. It’s this kind of success that creates > exceptional opportunities for ambitious people. If you’re looking for a > place where you can perform your best, consider the following position > in our Reston, Virginia headquarters: > > > > Software Developer > > > > You will develop Internet applications in teams from Siteworx > specifications. You will work closely with many Senior Developers to > improve your knowledge and technical prowess. Siteworx has very high > standards and understands that very few people are qualified to do what > we do upon hiring, however, the position requires a BA/BS in a technical > field and 1+ years experience (internships applicable) in software > development. Fluency with three or more of following is necessary: > XHTML, CSS, C/C++, Javascript, Java, Python, XSLT. A background in > Object Oriented Programming is necessary and familiarity with Zope is a > major plus. > Nina: See http://www.python.org/Jobs-howto.html for how to get this on the python.org web site. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: RSA in python
Abhisek Datta wrote: > -BEGIN RSA PUBLIC KEY- > MIGJAoGBALxi3tGXlSwRgn7/Km6mTSge+5ijQgIn3GvnZOeYyOo1DkubVtTaFj26 > GWtJo43MEe1a5UlWKJEOpbKVCr4AASfFj8YmmRewH4SXdZ+w1Bad8amyzL2h8F7J > wJojOnocSs6xDE7o86CpZRUlojBefanMdCpu074QFktE63OD1zBBAgMBAAE= > -END RSA PUBLIC KEY- > > Traceback (most recent call last): [...] > M2Crypto.RSA.RSAError: no start line The files in M2Crypto tests directory don't have any files that have "BEGIN RSA PUBLIC KEY" in them - haven't checked if this is legal or not. However, plain OpenSSL does not like that file either: $ openssl rsa -in rsa_heikki.pem -pubin 3440:error:0906D06C:PEM routines:PEM_read_bio:no startline:pem_lib.c:644:Expecting: PUBLIC KEY $ openssl rsa -in rsa_heikki.pem -check 2140:error:0906D06C:PEM routines:PEM_read_bio:no startline:pem_lib.c:644:Expecting: ANY PRIVATE KEY If I take out the "RSA " part from the delimiter lines I get: $ openssl rsa -in rsa_heikki2.pem -pubin unable to load Public Key 3124:error:0D0680A8:asn1 encoding routines:ASN1_CHECK_TLEN:wrong tag:tasn_dec.c: 1282: 3124:error:0D07803A:asn1 encoding routines:ASN1_ITEM_EX_D2I:nested asn1 error:ta sn_dec.c:374:Type=X509_ALGOR 3124:error:0D08303A:asn1 encoding routines:ASN1_TEMPLATE_NOEXP_D2I:nested asn1 e rror:tasn_dec.c:743:Field=algor, Type=X509_PUBKEY 3124:error:0906700D:PEM routines:PEM_ASN1_read_bio:ASN1 lib:pem_oth.c:83: $ openssl rsa -in rsa_heikki2.pem -check unable to load Private Key 2304:error:0906D06C:PEM routines:PEM_read_bio:no start line:pem_lib.c:644:Expect ing: ANY PRIVATE KEY My suggestion would be to ask on the openssl-users list. -- Heikki Toivonen signature.asc Description: OpenPGP digital signature -- http://mail.python.org/mailman/listinfo/python-list
Re: warning for google api users
Producing a SERPS scraper for Google would be very easy and possible in about 10-15 lines of code. However, its against the Google terms of service and if they decide to bite you for breaching them then you'll be in trouble. Its also a reason you'll not likely find one that trumpets its existence very much as the site promoting it would probably be taken off the Google index - severely effecting visitors. On 2/21/06, Gabriel B. <[EMAIL PROTECTED]> wrote: the google webservices (aka google API) is not even close for any kindof real use yetif you search for the same term 10 times, you get 3 mixed totals. 2mixed result order. and one or two "502 bad gateway" i did an extensive match agains the API and the regular searchservice. the most average set of results:results 1-10; total: 373000results 11-20; total: 151000results 21-30; total: 151000results 31-40; total: 373000 results 41-50; total: 373000results 51-60; total: 373000results 61-70; total: 151000( 502 bad gateway. retry)results 71-80; total: 373000results 81-90; total: 151000( 502 bad gateway. retry) results 91-100; total: 373000on the regular google search, total: 2,050,000 (for every page, ofcourse)besides that, the first and third result on the regular google search,does not apear in the 100 results from the API in this query, but this is not average, more like 1 chance in 10 :-/So, no matter how much google insists that this parrot is sleeping,it's simply dead.now, what i presume that is happening, is that they have a dozen of machine pools, and each one has a broken snapshot of the productionindex (probably they have some process to import the index and or itexplode in some point or they simply kill it after some time). andthey obviously don't run that process very often. Now... anyone has some implementation of pygoogle.py that scraps theregular html service instead of using SOAP? :)Gabriel B.--http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Zope 3?? How do you start it on Windows?
Many good points! Thx Matt. -- http://mail.python.org/mailman/listinfo/python-list
Re: algorithm, optimization, or other problem?
Hello, If the parameters that are received by functions in order to calculate weights, th's and dot's products , are equal to each other in different cycles (and i bet more than often they will) i suggest you replace those functions with memoizable functions. That also would ease work inside the loop. Take into account other suggestions people have made and review memoization in Python. Regards. Jesus (Neurogeek) Bas wrote: >Hi, > >as the others have already said, move all the invariants out of the >loop. It is also not useful to randomly draw a vector out of random >array. Some other small things: > >for i in range(len(x)): do something with x[i] >should probably be replaced by >for xi in x: do something with xi >this saves an array index operation, don't know if this works for a >numeric array > >You use the y**2 twice. A good compiler might notice this, but Python >is interpreted... > >use += instead of + for w, the calculation can be done in place, this >might save the creation of a new array/variable > >I am not sure what you are doing with x, bit it seems that you are >transposing it a few times to many. Mightbe you can declare x as the >transpose of what you do now, thereby saving the transpose in the loop? > >so my guess (not tested): > >x=random((1000,100))# 1000 input vectors, declared differently >for xx in x: > y=dot(xx,w) > y2 = y*y > w+=ETA*(y*xx-y2*w); > th+= INV_TAU*(y2-th); > > >Hope it helps, >Bas > > > -- http://mail.python.org/mailman/listinfo/python-list
Re: Augmented assignment
Terry Hancock wrote: > On Tue, 21 Feb 2006 10:55:42 +0530 > Suresh Jeevanandam <[EMAIL PROTECTED]> wrote: > Seriously, > I think they are usually equivalent internally, > at least for immutable objects. > yah, but when you do augmented assigns on lists, or mix immutable an dmutable: http://zephyrfalcon.org/labs/python_pitfalls.html -- http://mail.python.org/mailman/listinfo/python-list
warning for google api users
the google webservices (aka google API) is not even close for any kind of real use yet if you search for the same term 10 times, you get 3 mixed totals. 2 mixed result order. and one or two "502 bad gateway" i did an extensive match agains the API and the regular search service. the most average set of results: results 1-10; total: 373000 results 11-20; total: 151000 results 21-30; total: 151000 results 31-40; total: 373000 results 41-50; total: 373000 results 51-60; total: 373000 results 61-70; total: 151000 ( 502 bad gateway. retry) results 71-80; total: 373000 results 81-90; total: 151000 ( 502 bad gateway. retry) results 91-100; total: 373000 on the regular google search, total: 2,050,000 (for every page, of course) besides that, the first and third result on the regular google search, does not apear in the 100 results from the API in this query, but this is not average, more like 1 chance in 10 :-/ So, no matter how much google insists that this parrot is sleeping, it's simply dead. now, what i presume that is happening, is that they have a dozen of machine pools, and each one has a broken snapshot of the production index (probably they have some process to import the index and or it explode in some point or they simply kill it after some time). and they obviously don't run that process very often. Now... anyone has some implementation of pygoogle.py that scraps the regular html service instead of using SOAP? :) Gabriel B. -- http://mail.python.org/mailman/listinfo/python-list
That's really high-level: bits of beautiful python
I have a friend who has been programming in C for many years, and he is
a great fan of the language. However, he (and I) are about to start a
python course, and he has been asking me a lot of questions. He often
responds to my answers with "Urgh! Object-orientation!" and suchlike.
But today we were discussing the problem of running externally-provided
code (e.g. add-on modules). Neither of us knew how to do it in C, though
I suggested using DLLs. However, I quickly installed python on his
laptop and coded this:
exec "import %s as ext_mod" % raw_input("Module: ")
ext_mod.do()
And created to sample modules with do() functions to demonstrate. He was
impressed ("That's really high-level" were his words).
I was just thinking perhaps we should create some kind of collection of
bits of "impressive" code like this.
He also liked 99 Bottles in one line:
print '\n'.join(["%d bottles of beer on the wall." % i for i in
range(100,0,-1)])
--Max
--
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Re: Zope 3?? How do you start it on Windows?
kbperry wrote: > Cool thx Matt. I did finally figure it out, but barely. Why would you > want to download and install Zope without creating an instance? It > seems kind of dumb to me. This is a quite normal separation. I think you will find the same thing among both database systems and various web tool kits. Some database systems do create an instance on installation, but that's because those database systems need one main systems database per install to adminster the other databases. Whether it's Oracle, Zope or Django, you can have many instances running in one installation. I installed Trac yesterday. It worked just the same way. In settings with more than just a few developers, it's quite normal that system admins install software products such as Zope, while software developers create Zope instances. Why on earth would you force the sysadmin to make a Zope instance? He doesn't need one! The developer probably doesn't have root access, and it isn't his job to install third party s/w. -- http://mail.python.org/mailman/listinfo/python-list
Re: Little tool - but very big size... :-(
Larry Bates wrote: > Since the target is Windows only, consider using win32gui > (part of Mark Hammonds win32 extensions) calls to use > native Windows controls. That way you can eliminate > wxWindows altogether. If all you need is a file dialog, > it isn't very difficult. A good point, and one the developer of Venster thought of as well, since he's already done much of this work (and without even requiring win32gui, as he went through the lighter-weight ctypes). http://venster.sourceforge.net/htdocs/index.html (I haven't tried using this myself, but there's an 800K example of a Windows GUI app included on that page for download.) -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Writing my own typing monitor program for RSI sufferers...
Well, this is the one part that I have no idea how to doas far as I can tell the information simply is not in /proc. I need a different method to discover when someone is typing. That's what I came to the list for, to get a clue as to how to do that. Certainly someone has an idea how to detect typing on a usb keyboard under pythonsome external library must exist? Thanks p.s. Diez...I'll read that over, and will look forward to seeing what you come up with. Please email me to let me know..I suspect that your approach will require kernel modifications I don't want to go down that path. I'd be okay with it once, cut the last thing I want to do is repatch my ubuntu kernel every time there was a security fix. -- http://mail.python.org/mailman/listinfo/python-list
Re: Augmented assignment
On Tue, 21 Feb 2006 10:55:42 +0530 Suresh Jeevanandam <[EMAIL PROTECTED]> wrote: > Is there any gain in performance because of > augmented assignments. > > x += 1 vs x = x+1 Yep. I perform better when I only type names once. Especially if they are long: length_of_object_I_must_describe_very_carefully += 1 vs length_of_object_I_must_describe_very_carefully = length_of_object_I_must_describe_very_carefully + 1 Oh, you mean performance of the computer? ;-) But Python is all about optimizing the performance of programmers, not computers! Seriously, I think they are usually equivalent internally, at least for immutable objects. -- Terry Hancock ([EMAIL PROTECTED]) Anansi Spaceworks http://www.AnansiSpaceworks.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Is there a way to build python without 'posixmodule' ?
mrstephengross wrote: > I'm working on building python 2.4.2 with the mingw compiler (on > cygwin). Try following the instructions on the pyMinGW site: http://jove.prohosting.com/iwave/ipython/pyMinGW.html Ross Ridge -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiple assignment and the expression on the right side
On Tue, 21 Feb 2006 10:53:21 +0530 Suresh Jeevanandam <[EMAIL PROTECTED]> wrote: > I read in "Python in a Nutshell" that when we have > multiple assignments > made on a single line, it is equivalent to have those many > simple assignments and that the right side is evaluated > once for each assignment. [The wordings are mine. I am > not sure if this is what he intended]. > >>> c = d = e = x() AFAIK, this is equivalent to this: e = x() d = e c = d So, in fact, what you say is true, but these, of course will not evaluate x multiple times. -- Terry Hancock ([EMAIL PROTECTED]) Anansi Spaceworks http://www.AnansiSpaceworks.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Little tool - but very big size... :-(
[EMAIL PROTECTED] wrote: || 11MB is seldom a concern for today's machine. || A good windows/microsoft attitude.. :-) -- "Last week, I stated this woman was the ugliest woman I had ever seen. I have since been visited by her sister, and now wish to withdraw that statement." -- Mark Twain -- http://mail.python.org/mailman/listinfo/python-list
Re: Zope/Plone - Is it the right solution?
On 21 Feb 2006 08:00:03 -0800, Michele Simionato <[EMAIL PROTECTED]> wrote: For easy of use nothing beats CherryPy, but I am not sure how stable itis. If CherryPy is of interest then don't discount Karrigell, it has a smaller learning curve and appears stable. Overall I found it quicker to become productive than with CP. see http://quentel.python-hosting.com/wiki/index.pih and http://karrigell.sourceforge.net/ -- Tim Williams -- http://mail.python.org/mailman/listinfo/python-list
Re: html parser , unexpected '<' char in declaration
Oopss! You are totally right guys, i did miss the closing '>' thinking about maybe errors in the use of ' or ". Jesus Tim Roberts wrote: >"Jesus Rivero - (Neurogeek)" <[EMAIL PROTECTED]> wrote: > > >>hmmm, that's kind of different issue then. >> >>I can guess, from the error you pasted earlier, that the problem shown >>is due to the fact Python is interpreting a "<" as an expression and not >>as a char. review your code or try to figure out the exact input you're >>receving within the mta. >> >> > >Well, Jesus, you are 0 for 2. Sakcee pointed out what the exact problem >was in his original message. The HTML he is being given is ill-formed; the > tag >which it thinks is inside the > > >>>well probabbly I should explain more. this is part of an email . after >>>the mta delivers the email, it is stored in a local dir. >>>After that the email is being parsed by the parser inside an web based >>>imap client at display time. >>> >>>I dont think I have the choice of rewriting the message!? and I dont >>>want to reject the message alltogether. >>> >>>I can either 1-fix the incoming html by tidying it up >>>or 2- strip only plain text out and dispaly that you have spam, 3 - or >>>ignore that mal-formatted tag and display the rest >>> >>> > >If this is happening with more than one message, you could check for it >rather easily with a regular expression, or even just ''.find, and then >either insert a closing '>' or delete everything up to the before >parsing it. > > -- http://mail.python.org/mailman/listinfo/python-list
Re: Zope/Plone - Is it the right solution?
Fredrik Lundh wrote: > "kbperry" wrote: >>I am currently a student, and for our HCI class project we are >>redeveloping our CS website. I attend a very large university (around >>30,000 students), and the CS site will need to be updated by many >>people that don't have technical skills (like clerical staff). >> >>The biggest problem with the current site is that not enough people >>have access to update it. Since I love python, these seemed like >>viable solutions. >> >>1) Is Zope/Plone overkill for this type of project? >> >>2) Why use Plone vs. straight up Zope? >> >>3) Is there a way to get over the steep learning curves (that I have >>read about)? > > do you want to build a web application, use a ready-made CMS, or is the goal > to > easily get lots of information on to the (intra)web ? > > if the latter, a modern wiki with good access control could be worth > investigating: > > http://moinmoin.wikiwikiweb.de/ > http://moinmoin.wikiwikiweb.de/HelpOnAccessControlLists > > (for performance, you may want to run the wiki behind mod_proxy) > > if you want a ready-made content management system, pick Plone. I'd heartily agree with Fredrik on this.. If you just want to manage a set of interlinked documents (i.e. content oriented web pages) then a wiki will get you going and contributors updating stuff faster than pretty much anything going. Plone will give you more structure (allow you to create your own types of conten or object e.g. courses, buildings, whatever) with more effort and more maintenance. Rolling your own with any framework out there will inevitably give you the most flexibility (you can do pretty much what you want) traded off against a lot larger investment in time at the start and ongoing. If you want it to be a project, there isn't much to get your teeth into in creating a wiki based site (you can write you own modules and plug-ins I suppose). Plone/Zope3 would challenge you more and you'd have a chance to learn some different approaches to common cs problems. If I were to recommend based on you wanting a project, I'd say zope3. If it's based on getting some content up and editable quickly then I'd say wiki. If you're aiming for a structured website to handle some of the typical course info (handling events, rooms, dates, etc) I'd recommend plone. Tim Parkin p.s. The steep learning curve should only be if you want to do something to 'extend' the plone/zope system. As long as you are happy with the defaults for common components you shouldn't have too much to learn. -- http://mail.python.org/mailman/listinfo/python-list
