FileNotFoundError: [WinError 2] 系统找不到指定的文件

用Idle运行Python脚本的时候发现如下错误：

Traceback (most recent call last):
  File "D:\Python\Python36-32\lib\site-packages\selenium-3.4.3-py3.6.egg\selenium\webdriver\common\service.py", line 74, in start
    stdout=self.log_file, stderr=self.log_file)
  File "D:\Python\Python36-32\lib\subprocess.py", line 707, in __init__
    restore_signals, start_new_session)
  File "D:\Python\Python36-32\lib\subprocess.py", line 990, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2] 系统找不到指定的文件。

后来在stackoverflow上找到如下解决办法：

In Windows , to use echo in subprocess, you would need to use shell=True . This is because echo is not a separate executable, but rather a built-in command for the windows command line. Example -
在windows 在子进程中使用echo，需要设置 shell =True，因为 echo 不是单独的命令，而是window CMD 内置的命令

process1 = subprocess.Popen(command1,stdout=subprocess.PIPE,shell=True)

Also, please do note, you should only use shell=True when absolutely necessary (as in this case , to use echo in windows in subprocess).

并且，需要注意，只有在绝对需要的情况下才使用shell=True

找到 subprocess.py脚本，将对应行加上shell=true 参数。