Hello,
I got a problem with backend in matplotlib.
I used ipython for launching the codes and the backend of
matplotlib is GTKAgg. I have a code.py with a for loop for processing data,
and in each iteration I read and plot and save the figures. Because
there are so many figures, I set the non-interative mode and not
using
"show()" in the code. Then the memory is used more and more as the
iteration number increases, and the most memory is due to write_png
function. I guess that the figures (though not shown on the screen)
from each iteration take the memory, and try to close the figures produced at
each iteration.
what I did:
modify the backend to Agg in the code
add "close('all')" before each iteration finish.
This works for removing the memory problem. But a new issue
arrive.
After the run is finished, the ipython command window has no response
to any keyboard input for a few seconds, then a warning message appear:
"Warning: Timeout for mainloop thread exceeded switching to
nonthreaded mode (until mainloop wakes up again)",
and when I tried to quit ipython afterwards, it is stuck there and
the
ipython is crashed.
But if I tried using "python code.py" , then it works well : no warnings.
Does it mean that we can not use ipython and a backend non-GUI at the same
time ?
Any one would like to explain a bit ? Thanks in advance !!
xiaoni
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