Python subprocess.check_output()

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mystring = subprocess.check_output(["sudo iwlist wlan0 scan"], universal_newlines=True)
word = 'Devsign2G'
print (mystring)
print (word)

if word in str(mystring):
print ('success')

- error message -P＞＜／

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Traceback (most recent call last):
File"test.py", line 52, in
mystring = subprocess.check_output(["sudo iwlist wlan0 scan"], universal_newlines=True)
File"/usr/lib/python2.7/subprocess.py", line 212, in check_output
process = Popen(stdout=PIPE, *popenargs, **kwargs)
File"/usr/lib/python2.7/subprocess.py", line 390, in __init__
errread, errwrite)
File"/usr/lib/python2.7/subprocess.py", line 1024, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory

什么是问题？P＞＜／

what is the problem?

OSError: [Errno 2] No such file or directory是指要执行的子进程命令。

程序参数必须按顺序单独传递，因此更改

1	["sudo iwlist wlan0 scan"]

到

1	["sudo","iwlist","wlan0","scan"]

您的代码似乎使用了一个名为"Subprocess"的文件，该文件位于以下位置：/usr/lib/python2.7/subprocess.py

但是文件或目录不在那里。您可以更改目录或将文件放在正确的文件夹中。

如果是包装的。你用PIP或其他东西安装了这个包吗？是进口的吗？