Python subprocess.check_output()

Question

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

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

-错误消息-

   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

问题出在哪里？

Answer 1

看起来您的代码正在使用一个名为“子进程”的文件，该文件位于此处：/usr/lib/python2.7/子进程.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。

如果是打包的。你们是用pip还是sth装的包？是进口的吗？

Answer 2

问题出在哪里？

< code > OSError:[Errno 2]No this file or directory 指的是要执行的子进程命令。

程序参数必须在序列中单独传递，所以

["sudo iwlist wlan0 scan"]

到

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