ImportError: No module named matplotlib.pyplot

转自：https://my.oschina.net/letiantian/blog/339901

sklearn的网站上不去，准备编译一下在github中的文档：

$ cd scikit-learn-master/doc
$ make html

出现以下错误：

Exception occurred:
  File "/home/sunlt/Downloads/scikit-learn-master/doc/sphinxext/gen_rst.py", line 850, in generate_file_rst
    import matplotlib.pyplot as plt
ImportError: No module named matplotlib.pyplot
The full traceback has been saved in /tmp/sphinx-err-7pCJ3k.log, if you want to report the issue to the developers.

用pip安装：

$ sudo pip install matplotlib

依然是这个错误，

使用下面的命令安装，就没有问题了：

$ sudo apt-get install python-matplotlib