There is a known bug that matplotlib leaks file handles on Windows. This has (to the best of my knowledge as a non-Windows user), been fixed for Python 2.x by #798. This is not currently in any released version of matplotlib, unfortunately, but it will make it into the next bugfix release.
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mdboom commented on May 15, 2012
There is a known bug that matplotlib leaks file handles on Windows. This has (to the best of my knowledge as a non-Windows user), been fixed for Python 2.x by #798. This is not currently in any released version of matplotlib, unfortunately, but it will make it into the next bugfix release.
sommerc commented on May 15, 2012
Cheers, thx for your great work!