pydot下载问题

在用python/draw_net.py画图时，出现以下问题：

zml@zml-Inspiron-5423:~/caffe/examples/mnist$ python ~/caffe/python/draw_net.py  lenet_train_test.prototxt  a1.png --rankdir=LR

Traceback (most recent call last):
  File "/home/zml/caffe/python/draw_net.py", line 9, in
    import caffe.draw
  File "/home/zml/caffe/python/caffe/draw.py", line 22, in
    import pydot

ImportError: No module named pydot

参考其他博客：pip install  grapviz;      pip install pydot; 下载pydot依旧出问题：

installing collected packages: pyparsing, pydot

  Found existing installation: pyparsing 2.0.1
Cannot uninstall 'pyparsing'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.

解决方案：sudo apt-get install python-pydot;

在mnist目录下运行以上命令；成功！