I am sure this is a well know issue, so please feel free to just give a 
link if the answer and solution are long.  I have a newly installed 
matplotlib installations running on Windows XP using Python 2.5.4.  When 
I execute a simple 4 line example (copied directly from the PyPlot 
tutorial) in either PythonWin or IDLE, , it works fine and I terminate 
by right clicking on the generated figure and doing a Close.  However, 
when I rerun the code from the IDE (makes no difference if I use 
PythonWin or IDLE) the figure hangs and eventually I get an abnormal 
exit and crash out of the IDE (in PythonWin there is a dialogue box that 
says “Runtime Error” in pythonwin.exe.  This makes debugging in an IDE 
very clumsy, because I need to exit and restart it every time I run 
python code.

The test code is simply:

import matplotlib.pyplot as plt
plt.plot([1,2,3])
plt.ylabel('Some Numbers')
plt.show()


Thanks in advance,

David Lees

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