win10下keras模型可视化plot_model报错终极解决办法

报错如下：

Traceback (most recent call last):
  File "E:\Anaconda3\envs\tensorflow_GPU\lib\site-packages\pydot.py", line 1915, in create
    working_dir=tmp_dir,
  File "E:\Anaconda3\envs\tensorflow_GPU\lib\site-packages\pydot.py", line 136, in call_graphviz
    **kwargs
  File "E:\Anaconda3\envs\tensorflow_GPU\lib\subprocess.py", line 709, in __init__
    restore_signals, start_new_session)
  File "E:\Anaconda3\envs\tensorflow_GPU\lib\subprocess.py", line 997, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2] 系统找不到指定的文件。

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "E:\Anaconda3\envs\tensorflow_GPU\lib\site-packages\keras\utils\vis_utils.py", line 26, in _check_pydot
    pydot.Dot.create(pydot.Dot())
  File "E:\Anaconda3\envs\tensorflow_GPU\lib\site-packages\pydot.py", line 1922, in create
    raise OSError(*args)
FileNotFoundError: [WinError 2] "dot" not found in path.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "c:\Users\51695\.vscode\extensions\ms-python.python-2019.2.5416\pythonFiles\ptvsd_launcher.py", line 45, in
    main(ptvsdArgs)
  File "c:\Users\51695\.vscode\extensions\ms-python.python-2019.2.5416\pythonFiles\lib\python\ptvsd\__main__.py", line 357, in main
    run()
  File "c:\Users\51695\.vscode\extensions\ms-python.python-2019.2.5416\pythonFiles\lib\python\ptvsd\__main__.py", line 257, in run_file
    runpy.run_path(target, run_name='__main__')
  File "E:\Anaconda3\envs\tensorflow_GPU\lib\runpy.py", line 263, in run_path
    pkg_name=pkg_name, script_name=fname)
  File "E:\Anaconda3\envs\tensorflow_GPU\lib\runpy.py", line 96, in _run_module_code
    mod_name, mod_spec, pkg_name, script_name)
  File "E:\Anaconda3\envs\tensorflow_GPU\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "e:\Pythonprogram\SRMD_Keras\models\models.py", line 49, in
    plot_model(mysrmd_model, to_file='srmd_model.png')
  File "E:\Anaconda3\envs\tensorflow_GPU\lib\site-packages\keras\utils\vis_utils.py", line 132, in plot_model
    dot = model_to_dot(model, show_shapes, show_layer_names, rankdir)
  File "E:\Anaconda3\envs\tensorflow_GPU\lib\site-packages\keras\utils\vis_utils.py", line 55, in model_to_dot
    _check_pydot()
  File "E:\Anaconda3\envs\tensorflow_GPU\lib\site-packages\keras\utils\vis_utils.py", line 29, in _check_pydot
    '`pydot` failed to call GraphViz.'
OSError: `pydot` failed to call GraphViz.Please install GraphViz (https://www.graphviz.org/) and ensure that its executables are in the $PATH.

解决办法：

首先确定安装了pydot、pydot_ng和graphviz，

使用pip 或者conda安装 pydot-->pip install pydot

                                      pydot_ng-->pip install pydot_ng

从 https://graphviz.gitlab.io/download/ 下载windows二进制安装版本，安装好之后将graphviz的安装路径添加到环境变量当中去，安装graphviz时最好选择将安装选项选择为“所有人”。

完成以上步骤如果还是报错就把E:\Anaconda3\envs\tensorflow_GPU\Lib\site-packages下的pydot.py中的def get_executable_extension()改成下面的就可以了

if is_windows():
        return '.exe' if is_anacoda() else '.bat' 'change'