Runtime Error - Need Advice

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 <cgohlke@...2143...>*

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 <cgohlke@...2143...>*

02/09/2010 01:23 PM

To
                 Lee Boger <Boger_Lee@...2968...>
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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Python version 2.5.1, Tk version 8.4,
IDLE version 1.2.1

Lee

Christoph Gohlke <cgohlke@…2143…>
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

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

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 <cgohlke@…2143…>

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

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 <cgohlke@…2143…>

02/09/2010 01:23 PM

To

             Lee

Boger <Boger_Lee@…2968…>

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

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 =

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


The Planet: dedicated and managed hosting, cloud storage,
colocation

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in the

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···

On 2/9/2010 11:10 AM, Lee Boger wrote:

On 2/9/2010 10:44 AM, Lee Boger wrote:

On 2/9/2010 7:57 AM, Lee Boger wrote:

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