Python version 2.5.1, Tk version 8.4, IDLE version 1.2.1
Lee
Christoph Gohlke <cgoh...@uci.edu>
02/09/2010 03:08 PM
To
matplotlib-users <matplotlib-users@lists.sourceforge.net>
cc
Subject
Re: [Matplotlib-users] Runtime Error - Need Advice
Caterpillar: Confidential Green Retain Until: 03/11/2010
I am not sure what's going on. The script you posted imports pylab in
the first line. It should be defined. The scrit works just fine after
the proposed changes, even from Pythonwin. Did you completely quit
Pythonwin after the crashes and made sure no corrupted python instance
was left running? Please send the version string of your python
installation.
Christoph
On 2/9/2010 11:10 AM, Lee Boger wrote:
>
> Per another suggestion, I did uninstall numpy 1.4 and installed numpy
> 1.3, but got the same results. Using pylab.savefig('log_plot) resulted
> in the following error:
>
> Traceback (most recent call last):
> File "C:\Program Files\Common
>
Files\dSPACE\Python25\lib\site-packages\Pythonwin\pywin\framework\scriptutils.py",
> line 310, in RunScript
> exec codeObject in __main__.__dict__
> File "C:\Documents and Settings\BogerLC\My Documents\Script2.py", line
> 20, in <module>
> pylab.savefig('log_plot')
> NameError: name 'pylab' is not defined
>
> Using pyplot.savefig('log_plot') does not have an error, but I still get
> no file saved. Maybe it is a "backend" thing, which I know nothing
> about. I'll look into it. Thanks.
>
> Lee
>
>
> *Christoph Gohlke <cgoh...@uci.edu>*
>
> 02/09/2010 02:03 PM
>
>
> To
> matplotlib-users <matplotlib-users@lists.sourceforge.net>
> cc
>
> Subject
> Re: [Matplotlib-users] Runtime Error - Need Advice
>
>
>
>
>
> Caterpillar: Confidential Green Retain Until: 03/11/2010
>
>
>
>
> Use pylab.savefig('log_plot'). Also saving the figure to file and
> showing it interactively in the same script might involve switching
> backends, which might not work as expected.
>
> It is advisable to downgrade to numpy 1.3.
>
> -- Christoph
>
> On 2/9/2010 10:44 AM, Lee Boger wrote:
>>
>> Although, if I close the figure then re-run the script, a new figure
>> pops up but it doesn't have any data plotted. Interpreter is now locked
>> up. I'm still not fixing it completely. There is also no figure stored
>> as a file log_plot.
>>
>> Lee
>>
>>
>> *Christoph Gohlke <cgoh...@uci.edu>*
>>
>> 02/09/2010 01:23 PM
>>
>>
>> To
>> Lee Boger <boger_...@cat.com>
>> cc
>>
>> Subject
>> Re: [Matplotlib-users] Runtime Error - Need Advice
>>
>>
>>
>>
>>
>> Caterpillar: Confidential Green Retain Until: 03/11/2010
>>
>>
>>
>>
>> Change the last line to pylab.show() and it should work.
>>
>> Anyway, this example should not crash the interpreter. I can reproduce
>> the crash on Python 2.4, 2.5, and 2.6 (32 and 64 bit) on Windows with
>> mpl 0.99.1 but not on Ubuntu 9.1 with mpl 0.99.0.
>>
>> The shortest example that crashes is:
>>
>> python -c "import pylab;pylab.subplot(111).figure.show()"
>>
>> or on the interactive prompt:
>>
>>>>> import pylab
>>>>> pylab.subplot(111).figure.show()
>>>>> exit()
>> Fatal Python error: PyEval_RestoreThread: NULL tstate
>>
>> This application has requested the Runtime to terminate it in an
unusual
>> way.
>> Please contact the application's support team for more information.
>>
>>
>> -- Christoph
>>
>> On 2/9/2010 7:57 AM, Lee Boger wrote:
>>>
>>> Windows XP Professional with Python 2.5 installed (pywin32 build 210)
-
>>> came with dSPACE software package
>>>
>>> Downloaded and installed matplotlib-0.99.1.win32-py2.5.exe from
>>> sourceforge.net
>>>
>>> Downloaded and installed numpy-1.4.0-win32-superpack-python2.5.exe
from
>>> sourceforge.net
>>>
>>> Executing the following simple "log plot" script within PythonWin:
>>>
>>> *from* matplotlib *import* pylab
>>>
>>> # Create some artificial data.
>>> test_frequency = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16,
>>> 17, 18, 19, 20]
>>> test_results = [-0.2, -0.7, -1.0, -1.5, -2.0, -2.5, -3.0, -3.5, -4,
-5,
>>> -6, -7.1, -8, -9, -10, -11, -12, -15, -20, -25]
>>> spec_frequency = [6, 8]
>>> spec_results = [-3.0, -3.0]
>>>
>>> # Plot
>>> figure = pylab.subplot(111)
>>> figure.semilogx()
>>> figure.scatter(test_frequency, test_results, s=20, c='b', marker='s',
>>> edgecolors='none')
>>> figure.scatter(spec_frequency, spec_results, s=40, c='g', marker='s',
>>> edgecolors='none')
>>> figure.grid(True)
>>> figure.set_xlabel(r"Frequency (Hz)", fontsize = 12)
>>> figure.set_ylabel(r"Actuator Response (db)", fontsize = 12)
>>>
>>> figure.figure.savefig('log_plot')
>>> figure.figure.show()
>>>
>>>
>>> Plots a figure on the screen that looks correct, then the following
>>> error (when I click OK, PythonWin closes)
>>>
>>>
>>>
>>> Any advice would be appreciated. Maybe it's an installation or setup
>>> issue, but I'm pretty knew to Python programming and don't know how to
>>> debug this.
>>>
>>> Lee Boger
>>>
>>>
>>>
>>>
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>
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