.matplotlibrc 和默认选项 [英] .matplotlibrc and default options

问题描述

我正在研究用于Python的matplotlib库.我开始了解它的一些基本复杂性，如 pylab 和 pyplot 之间的区别，并且我正在尝试复制和修改图库中的一些示例.

I am studying the matplotlib library for Python. I am starting to understand some of its basic intricacies, as the difference between pylab and pyplot, and I am trying to replicate and modify some of the examples in the gallery.

我还不太明白的一件事是配置文件matplotlibrc的实际作用.

One thing that still I don't understand clearly is the actual role of the configuration file matplotlibrc.

目前，我在Windows 7下使用WinPython 3.3.5.0 64位分发版..matplotlibrc文件位于WinPython-64bit-3.3.5.0 \ python-3.3.5.amd64 \ lib \ site-packages \ matplotlib \ mpl-data \ matplotlibrc

At present I use the WinPython 3.3.5.0 64 bit distribution under Windows 7. The .matplotlibrc file is under WinPython-64bit-3.3.5.0\python-3.3.5.amd64\lib\site-packages\matplotlib\mpl-data\matplotlibrc

我想开始更改一些选项，作为默认字体，所以我打开它，发现除了一行(后端:TkAgg)之外的所有行都被注释了.

I want starting to change some options, as the default font, so I opened it, discovering that all the lines, except one (backend : TkAgg) are commented.

所以我想问一下matplotlib从哪里获取所有默认值(例如fonts属性).某处是否有另一个文件，或者它们是否以某种方式在库中硬编码"?谢谢.

So I would like to ask from where matplotlib takes all the default values (e.g. the fonts properties). Is there another file somewhere, or are they in some way "hard-coded" in the library? Thanks.

推荐答案

matplotlibrc 文件是:

Search order:                                                                                                                             

 * current working dir                                                                                                                    
 * environ var MATPLOTLIBRC                                                                                                               
 * HOME/.matplotlib/matplotlibrc                                                                                                          
 * MATPLOTLIBDATA/matplotlibrc

如果在这些路径中没有找到文件，则会发出警告:

and if no file is found in these paths a warning is raised:

warnings.warn('Could not find matplotlibrc; using defaults')

matplotlibrc 文件只是对现有默认参数的更新.可以使用以下方法找到它们:

The matplotlibrc file is just an update to the existing default parameters. These can be found using:

from matplotlib.rcsetup import defaultParams

(这显然在matplotlib/rcsetup.py)

在 __ init __.py 文件中，matplotlib循环浏览此字典并定义将用于所有脚本和代码的默认rc参数:

In the __init__.py file, matplotlib cycles through this dictionary and defines the default rc parameter that will be used for all scripts and codes:

rcParamsDefault = RcParams([ (key, default) for key, (default, converter) in \
                    defaultParams.iteritems() ])

因此，如果您想知道默认值，请查看:

So if you want to know the defaults, look at:

In [4]: import matplotlib

In [5]: matplotlib.rcParamsDefault
Out[5]: 
{'agg.path.chunksize': 0,
 'animation.bitrate': -1,
 'animation.codec': 'mpeg4',
 'animation.ffmpeg_args': '',
 'animation.ffmpeg_path': 'ffmpeg',
 'animation.frame_format': 'png',
 'animation.mencoder_args': '',
 'animation.mencoder_path': 'mencoder',
 'animation.writer': 'ffmpeg',
 ...

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