Recurring matplotlib warning

[gianmatharu]

/usr/local/lib/python2.7/dist-packages/matplotlib/font_manager.py:273: UserWarning: Matplotlib is building the font cache using fc-list. This may take a moment.
warnings.warn('Matplotlib is building the font cache using fc-list. This may take a moment.')

This warning occurs when using wrappers to spawn multiple processes pbsdsh/slurm (presumably). Reloading objects that import obspy causes this warning to trigger on each import. At the very least it creates spam in the output.log; it's unclear if there is additional overhead.

matplotlib/matplotlib#5836 - relevant matplotlib discussion.

Would be nice to suppress this or perhaps limit importing Obspy to where necessary.

[rmodrak]

Currently, obspy is imported at module level only once, in seisflows.preprocess.base. A module level import seems appropriate in this case because the main work of the module (i/o and signal processing) rests entirely on obspy calls.

As a workaround, perhaps you could suppress warnings by adding some code at the end of seisflows.tools.config (but don't commit these changes to the master branch). This page I think provides a recipe:
http://stackoverflow.com/questions/14463277/how-to-disable-python-warnings

Since seisflows.tools.config is always imported prior to any other SeisFlows modules, adding code here should reliably suppress warnings.

If you decide to try this approach and it proves successful, could you post an update to this thread?

Thanks,
Ryan

[gianmatharu]

This warning seems to have disappeared without any effort on my part so I'll close this for now.

[rmodrak]

glad to hear

On Sat, Mar 5, 2016 at 9:03 PM, gianmatharu notifications@github.com
wrote:

This warning seems to have disappeared without any effort on my part so
I'll close this for now.

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