我使用 jupyder 笔记本：
from IPython import display
graph = net_drawer.GetPydotGraph(train_model.net.Proto().op, 'mnist', rankdir='LR')
#graph.write_png("lenet.png")
display.Image(graph.create_png(), width=800)
我遇到了这个错误：
---------------------------------------------------------------------------
OSError Traceback (most recent call last)
<ipython-input-11-95f1d8e2feb8> in <module>()
2 graph = net_drawer.GetPydotGraph(train_model.net.Proto().op, 'mnist', rankdir='LR')
3 #graph.write_png("lenet.png")
----> 4 display.Image(graph.create_png(), width=800)
/home/user/.local/lib/python2.7/site-packages/pydot.pyc in new_method(f, prog, encoding)
1660 """Refer to docstring of method `create`."""
1661 return self.create(
-> 1662 format=f, prog=prog, encoding=encoding)
1663 name = 'create_{fmt}'.format(fmt=frmt)
1664 self.__setattr__(name, new_method)
/home/user/.local/lib/python2.7/site-packages/pydot.pyc in create(self, prog, format, encoding)
1865 args[1] = '"{prog}" not found in path.'.format(
1866 prog=prog)
-> 1867 raise OSError(*args)
1868 else:
1869 raise
OSError: [Errno 2] "dot" not found in path.
我可以在终端和 pycharm 中成功运行代码，但在 jupyder notebook 中失败。请你帮助我好吗？谢谢！此外，我已经成功安装了点，例如：
sudo apt-get insall graphviz
pip install pydot