matplotlib导入时需要时间 [英] matplotlib taking time when being imported

问题描述

我刚刚升级到matplotlib(1.5.1)的最新稳定版本，每次导入matplotlib时我都会收到以下消息:

/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.')

...总是停顿几秒钟.

这是预期的行为吗?以前也一样，只是没有打印出来的消息吗?

解决方案

按照上面的注释中的建议，删除文件:

fontList.cache
fontList.py3k.cache 
tex.cache 

解决问题. 就我而言，文件位于以下位置:

`~/.matplotlib`

已编辑

几天前，该消息再次出现，我删除了上述位置中的文件，但没有成功.我发现这是建议的 T Mudau中在此处，文本缓存文件还有一个额外的位置:~/.cache/fontconfig

I just upgraded to the latest stable release of matplotlib (1.5.1) and everytime I import matplotlib I get this message:

/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.')

... which always stalls for a few seconds.

Is this the expected behaviour? Was it the same also before, but just without the printed message?

解决方案

As tom suggested in the comment above, deleting the files:

fontList.cache
fontList.py3k.cache 
tex.cache 

solve the problem. In my case the files were under:

`~/.matplotlib`

EDITED

A couple of days ago the message appeared again, I deleted the files in the locations mention above without any success. I found that as suggested here by T Mudau there's an extra location with text cache files is: ~/.cache/fontconfig

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