首先Conda安装graphviz：
pip install graphviz
pip install pydot
其次在运行的.py文件前面加入如下内容:
import os os.environ["PATH"] += os.pathsep + 'C:\\Users\\10057491\\AppData\\Local\\Continuum\\anaconda3\\envs\\tensorflow\\Library\\bin\\graphviz'
pip install graphviz
pip install pydot
import os os.environ["PATH"] += os.pathsep + 'C:\\Users\\10057491\\AppData\\Local\\Continuum\\anaconda3\\envs\\tensorflow\\Library\\bin\\graphviz'
