FileNotFoundError[WinError 2] dot not found in path

WinError 2] dot not found in path"/>

FileNotFoundError[WinError 2] dot not found in path

Windos 10, python 3.6在进行随机森林编程实验时，报错：FileNotFoundError: [WinError 2] “dot” not found in path.具体错误内容如下：
Traceback (most recent call last):
File “E:\Anaconda3\envs\Python36\lib\site-packages\pydot.py”, line 1915, in create
working_dir=tmp_dir,
File “E:\Anaconda3\envs\Python36\lib\site-packages\pydot.py”, line 136, in call_graphviz
**kwargs
File “E:\Anaconda3\envs\Python36\lib\subprocess.py”, line 707, in init
restore_signals, start_new_session)
File “E:\Anaconda3\envs\Python36\lib\subprocess.py”, line 992, 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 “G:/Projects/01机器学习/01数据分析与机器学习/06随机森林/main.py”, line 123, in
graph.write_png(‘tree.png’);
File “E:\Anaconda3\envs\Python36\lib\site-packages\pydot.py”, line 1734, in new_method
encoding=encoding)
File “E:\Anaconda3\envs\Python36\lib\site-packages\pydot.py”, line 1817, in write
s = self.create(prog, format, encoding=encoding)
File “E:\Anaconda3\envs\Python36\lib\site-packages\pydot.py”, line 1922, in create
raise OSError(*args)
FileNotFoundError: [WinError 2] “dot” not found in path.

解决方法：打开E:\Anaconda3\envs\Python36\lib\site-packages\pydot.py文件，将阴影处的"dot"更改为"dot.exe"即可。