所以我刚刚将 matplotlib 更新到版本 3.0.2 。我可以很好地导入 matplotlib，但是当我尝试时import matplotlib.pyplot，我得到：
---------------------------------------------------------------------------
AttributeError
Traceback (most recent call last) <ipython-input-3-864e826dab68> in <module>()
----> 1 import matplotlib.pyplot
/usr/local/lib/python3.6/dist-packages/matplotlib/pyplot.py in <module>()
30 from cycler import cycler
31 import matplotlib
---> 32 import matplotlib.colorbar
33 import matplotlib.image
34 from matplotlib import rcsetup, style
/usr/local/lib/python3.6/dist-packages/matplotlib/colorbar.py in <module>()
30 import matplotlib.collections as collections
31 import matplotlib.colors as colors
---> 32 import matplotlib.contour as contour
33 import matplotlib.cm as cm
34 import matplotlib.gridspec as gridspec
/usr/local/lib/python3.6/dist-packages/matplotlib/contour.py in <module>()
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