RuntimeWarning: Glyph 20108 missing from current font. font.set_text(s, 0.0, flags=flags)解决办法

运行环境：MAC下eclipse的python3环境

/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:211: RuntimeWarning: Glyph 20108 missing from current font.
  font.set_text(s, 0.0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:211: RuntimeWarning: Glyph 20803 missing from current font.
  font.set_text(s, 0.0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:211: RuntimeWarning: Glyph 39640 missing from current font.
  font.set_text(s, 0.0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:211: RuntimeWarning: Glyph 26031 missing from current font.
  font.set_text(s, 0.0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:211: RuntimeWarning: Glyph 20998 missing from current font.
  font.set_text(s, 0.0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:211: RuntimeWarning: Glyph 24067 missing from current font.
  font.set_text(s, 0.0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:211: RuntimeWarning: Glyph 65292 missing from current font.
  font.set_text(s, 0.0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:211: RuntimeWarning: Glyph 26679 missing from current font.
  font.set_text(s, 0.0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:211: RuntimeWarning: Glyph 26412 missing from current font.
  font.set_text(s, 0.0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:211: RuntimeWarning: Glyph 20010 missing from current font.
  font.set_text(s, 0.0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:211: RuntimeWarning: Glyph 25968 missing from current font.
  font.set_text(s, 0.0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:211: RuntimeWarning: Glyph 65306 missing from current font.
  font.set_text(s, 0.0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:180: RuntimeWarning: Glyph 39640 missing from current font.
  font.set_text(s, 0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:180: RuntimeWarning: Glyph 26031 missing from current font.
  font.set_text(s, 0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:180: RuntimeWarning: Glyph 20998 missing from current font.
  font.set_text(s, 0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:180: RuntimeWarning: Glyph 24067 missing from current font.
  font.set_text(s, 0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:180: RuntimeWarning: Glyph 65292 missing from current font.
  font.set_text(s, 0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:180: RuntimeWarning: Glyph 26679 missing from current font.
  font.set_text(s, 0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:180: RuntimeWarning: Glyph 26412 missing from current font.
  font.set_text(s, 0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:180: RuntimeWarning: Glyph 20010 missing from current font.
  font.set_text(s, 0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:180: RuntimeWarning: Glyph 25968 missing from current font.
  font.set_text(s, 0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:180: RuntimeWarning: Glyph 65306 missing from current font.
  font.set_text(s, 0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:180: RuntimeWarning: Glyph 20108 missing from current font.
  font.set_text(s, 0, flags=flags)
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py:180: RuntimeWarning: Glyph 20803 missing from current font.
  font.set_text(s, 0, flags=flags)

警告原因：matplotlib中文乱码问题

解决办法

1、在终端python 的环境下，查看字体路径

import matplotlib    
print(matplotlib.matplotlib_fname())

2、下载SimHei
官方下载网址，并前往指定目录:/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf，将下载好的SimHei移动到该目录下。
3、删除matplotlib的缓冲目录
在终端python 的环境下，输入如下指令，查看matplotlib的字体缓存路径：

import matplotlib
matplotlib.get_cachedir()

然后使用rm -rf +路径删除缓存

4、修改matplotlibrc文件
修改/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/matplotlib/mpl-data/matplotlibrc，修改内容如下：

 font.family         : sans-serif   
 # 去掉前面的#     
 font.sans-serif     : SimHei, Bitstream Vera Sans, Lucida Grande, Verdana, Geneva, Lucid, Arial, Helvetica, Avant Garde, sans-serif  
 # 去掉前面的#，并在冒号后面添加SimHei
 axes.unicode_minus  : False
 # 去掉前面的#，并将True改为False

5、重新启动Eclipse。