RuntimeWarning: Glyph missing from current font. font.set_text(s, 0, flags=flags)

D:\miniconda3\envs\tf\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 39321 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\miniconda3\envs\tf\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 28207 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\miniconda3\envs\tf\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 28040 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\miniconda3\envs\tf\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 38450 missing from current font.
  font.set_text(s, 0, flags=flags)
D:\miniconda3\envs\tf\lib\site-packages\matplotlib\backends\backend_agg.py:180: RuntimeWarning: Glyph 34389 missing from current font.
  font.set_text(s, 0, flags=flags)

警告原因，plt 画图是找不到字体，需要手动设置：

plt.rcParams['font.sans-serif']=['SimHei'] #显示中文标签
plt.rcParams['axes.unicode_minus']=False

结果

发现图中原本缺失的中文回来了！