python 日常碰到的问题检索

1、python查看包的安装路径：打开cmd -> pip show matplotlib

2、pandas 作图无法显示中文

原因是 matplotlib 包默认只支持 ASCII 码，不支持 unicode 码。

解决方法，就是需要将 matplotlib 的安装目录下的 matplotlibrc 配置文件修改一下，将font.family 部分（大概在139行左右）注释去掉，并且在 font.serif 和 font.sans-serif 支持字体加上一个中文字体，如 SimHei：

font.family         : sans-serif
#font.style          : normal
#font.variant        : normal
#font.weight         : medium
#font.stretch        : normal
# note that font.size controls default text sizes.  To configure
# special text sizes tick labels, axes, labels, title, etc, see the rc
# settings for axes and ticks. Special text sizes can be defined
# relative to font.size, using the following values: xx-small, x-small,
# small, medium, large, x-large, xx-large, larger, or smaller
#font.size           : 12.0
font.serif          : SimHei, Bitstream Vera Serif, New Century Schoolbook, Century Schoolbook L, Utopia, ITC Bookman, Bookman, Nimbus Roman No9 L, Times New Roman, Times, Palatino, Charter, serif
font.sans-serif     : SimHei, Bitstream Vera Sans, Lucida Grande, Verdana, Geneva, Lucid, Arial, Helvetica, Avant Garde, sans-serif
#font.cursive        : Apple Chancery, Textile, Zapf Chancery, Sand, cursive
#font.fantasy        : Comic Sans MS, Chicago, Charcoal, Impact, Western, fantasy
#font.monospace      : Bitstream Vera Sans Mono, Andale Mono, Nimbus Mono L, Courier New, Courier, 

最终实现了正常显示中文。