有人可以向我解释这个错误：
>>> def j():
... import subprocess
... print(subprocess.Popen(['command', '-v', 'nmcli'], stdout=subprocess.PIPE, stderr=subprocess.PIPE))
...
>>> j()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 3, in j
File "/usr/lib/python3.4/subprocess.py", line 859, in __init__
restore_signals, start_new_session)
File "/usr/lib/python3.4/subprocess.py", line 1457, in _execute_child
raise child_exception_type(errno_num, err_msg)
FileNotFoundError: [Errno 2] No such file or directory: 'command'
我尝试将字符串作为列表，但它不会改变任何内容。
谢谢，
答案 0 :(得分：2)
FileNotFoundError：[Errno 2]没有这样的文件或目录：'command'
command是内置的shell。 subprocess.Popen默认情况下不会运行shell。
要运行shell，请传递shell=True：
>>> import subprocess
>>> subprocess.check_output('command -v python', shell=True)
b'/usr/bin/python\n'
要查找可执行文件的完整路径，您可以use shutil.which() instead：
>>> import shutil
>>> shutil.which('python')
'/usr/bin/python'