小编joe*_*dev的帖子

使用 Windows 7，Python 3.5.1：

import subprocess
subprocess.check_output(['echo', 'hello'])

引发错误：

Traceback (most recent call last):
File "<pyshell#8>", line 1, in <module>
    subprocess.check_output(['echo', 'hello'])
File "D:\Programs\Python 3.5.1\lib\subprocess.py", line 629, in check_output
    **kwargs).stdout
File "D:\Programs\Python 3.5.1\lib\subprocess.py", line 696, in run
    with Popen(*popenargs, **kwargs) as process:
File "D:\Programs\Python 3.5.1\lib\subprocess.py", line 950, in __init__
    restore_signals, start_new_session)
File "D:\Programs\Python 3.5.1\lib\subprocess.py", line 1220, in _execute_child
    startupinfo)

FileNotFoundError: [WinError 2] The system cannot find the file specified

所有子进程调用都会发生此错误，例如 subprocess.run、subprocess.call 和 subproccess.Popen。无论使用什么命令，都会发生相同的错误：

subprocess.check_output(['['D:\path\to\exe\program.exe', 'argument'])
FileNotFoundError: [WinError 2] The system …