🌐 Mailman 3 June 2010 - Python-list - python.org

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by babacity4＠gmail.com June 12, 2013

June 12, 2013

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global variable not working inside function. Increment
by Helvin May 13, 2013

May 13, 2013

Hi, This increment thing is driving me nearly to the nuts-stage. > < I have a function that allows me to pick points. I want to count the number of times I have picked points. global no_picked no_picked = 0 def picked(object, event): no_picked += 1 print no_picked Error msg says: UnboundLocalError: local variable 'no_picked' referenced before assignment For some reason, no_picked does not increment, but the printing statement works. Do you know why? (I'm actually writing this for a vtkrenderwindowinteractor.) Helvin

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how to get next month string?
by Yinghe Chen May 2, 2013

May 2, 2013

Hi, Could someone help on how to use python to output the next month string like this? "AUG07", suppose now is July 2007. I think also need to consider Dec 07 case, it is supposed to output as below: "JAN07". datetime module seems not supporting the arithmatic operations, any hints? Thanks in advance, Yinghe Chen

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Calling J from Python
by Gosi March 9, 2013

March 9, 2013

It is quite easy to call J from Python http://groups.google.com/group/J-Programming/browse_thread/thread/5e84b7566…

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Re: problems trying to build python 2.6 as a shared library
by Marco Nawijn Jan. 19, 2013

Jan. 19, 2013

On Sep 25, 1:08 pm, Chris Withers <ch...(a)simplistix.co.uk> wrote: > Hi All, > > I'm trying to build Python 2.6 as a shared library, so I did: > > ./configure --enable-shared > make > make altinstall > > No obvious signs of failure, but when I try and use the resulting > python, I get: > > python2.6: error while loading shared libraries: libpython2.6.so.1.0: > cannot open shared object file: No such file or directory > > Why might that be? > > cheers, > > Chris > > -- > Simplistix - Content Management, Batch Processing & Python Consulting > -http://www.simplistix.co.uk Hello Chris, The dynamic loader cannot find the python shared library. There are at least 2 options: 1. Add path that contains the shared library to the LD_LIBRARY_PATH environment variable. In a bash shell this can be accomplished by: export LD_LIBRARY_PATH=/path/to/python_shared_lib: $LD_LIBRARY_PATH 2. Add path to dynamic linker configuration file. This typically is in '/etc/ld.so.conf'. See man page for ld for more information. Note that I assumed that you are on a Unix/Linux machine. Regards, Marco

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Weirdness with python and stdin redirection under Win32
by Jonathan M. Gilligan Jan. 18, 2013

Jan. 18, 2013

I am getting an error reading stdin only when I invoke a python script by typing "bar | foo.py" or "foo.py < bar", but not when typing "bar | python foo.py" or "python foo.py < bar". The error arises ecause when input is redirected, stdin has fileno = -1 if the script is invoked as "foo.py", but correctly has fileno = 0 if it is invoked as "python foo.py" Consider the following script, which I want to use as a prototype for a simple stdin --> stdout filter: # foo.py import sys print "fileno = ", sys.stdin.fileno() lines = sys.stdin.xreadlines() for line in lines: sys.stdout.write(line) On win32 (Win2k pro, SP3), using ActiveState ActivePython 2.2.1 build 222, I can execute foo.py either by typing "foo.py" or "python foo.py" on the command line (the relevant registry key for opening .py files has command 'C:\Python22\python.exe "%1" %*'). If I type "echo bar | foo.py", I get C:\>echo bar | foo.py The process tried to write to a nonexistent pipe. fileno = -1 Traceback (most recent call last): File "C:\foo.py", line 7, in ? lines = sys.stdin.readlines() IOError: [Errno 9] Bad file descriptor whereas if I type "echo bar | python foo.py", I get C:\>echo bar | python foo.py fileno = 0 bar Other tests yield: C:\>foo.py < foo.py fileno = -1 Traceback (most recent call last): File "C:\Documents and Settings\Jonathan\My Documents\Programming\Omap VU\Fast CameraDriver\BF_LabView\Leo\foo.py", line 7, in ? for line in lines: IOError: [Errno 9] Bad file descriptor C:\>python foo.py < foo.py fileno = 0 # foo.py import sys print "fileno = ", sys.stdin.fileno() lines = sys.stdin.xreadlines() for line in lines: sys.stdout.write(line) If I just type "foo.py" or "python foo.py" on the command line, I get "fileno = 0" in both cases and the script works identically in both cases. Can anyone explain what's happening? Why the file descriptor for redirected stdin has a fileno of -1 if the python script is invoked using "foo.py" but not when it's invoked with "python foo.py"? Thanks, Jonathan

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by babacity4＠gmail.com Dec. 14, 2012

Dec. 14, 2012

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py2exe deal with python command line inside a program
by susan_kijiji＠yahoo.ca Sept. 28, 2012

Sept. 28, 2012

Hi, I need to create a python subprogress, like this: myProcess = subprocess.Popen([sys.executable, 'C:\myscript.py'], env=env, stdin=subprocess.PIPE, stdout=subprocess.PIPE) sys.executable was printed out as ''C:\\Python25\\python.exe'', how can I make this work in executable package through py2exe? I have to fix the following problems: -Source code shouldn't exposed in an executable program -Since python environment is not required when running an executable program, how to deal with the situation that "C:\\Python25\ \python.exe" is required as part of command? Thanks in advance!

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Redirecting STDOUT to a Python Variable
by Anthony Papillion Sept. 27, 2012

Sept. 27, 2012

I'm writing an application that uses the Google Storage Python library. When an error occurs, the error is printed on the terminal. What I need to do is intercept that text into a variable so I can run a re.search() against it and find out what's going on. I thought doing a output_text = method_name(parameters) would stuff the output in the output_text variable but it doesn't. How can I accomplish this?

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PHP vs. Python
by stephen.mayer＠gmail.com Sept. 25, 2012

Sept. 25, 2012

Anyone know which is faster? I'm a PHP programmer but considering getting into Python ... did searches on Google but didn't turn much up on this. Thanks! Stephen

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