python - 子进程 check_output(['dir' ]) 有利于 Linux 二进制文件

Question

我想在 shell 中查看 Windows 的 dir 命令的内容。我安装了 Cygwin 和 mingw。使用此代码，

import subprocess as sub
print sub.check_output(['dir'])

它被解析为

DCcircuits.py
IDLE\ (idle.pyw).lnk
Newpy.bat
idle.bat\ -\ Shortcut.lnk
idle.pyw\ -\ Shortcut.lnk
indexProgramFiles.py
maps\ traveler
orderedDict.txt
pipfreeze.txt
remote\ wireless
tracertIps.py

我正在尝试显示这样的输出。

 Volume in drive C is TI10693600D
 Volume Serial Number is 240D-7F0A

 Directory of C:\Users\Clayton

02/03/2016  10:22 AM    <DIR>          .
02/03/2016  10:22 AM    <DIR>          ..
11/05/2015  03:07 PM    <DIR>          .android
08/14/2015  12:02 PM    <DIR>          .idlerc
11/01/2015  10:38 PM    <DIR>          .jmc
01/04/2016  09:33 AM    <DIR>          .matplotlib
01/08/2016  10:18 AM    <DIR>          .oracle_jre_usage
09/04/2015  02:43 PM    <DIR>          3D Objects
01/29/2016  12:06 PM    <DIR>          Contacts
02/05/2016  10:35 AM    <DIR>          Desktop
02/04/2016  08:38 PM    <DIR>          Documents
02/04/2016  04:31 PM    <DIR>          Downloads
01/29/2016  12:06 PM    <DIR>          Favorites
02/04/2016  05:25 PM    <DIR>          Google Drive
01/29/2016  12:06 PM    <DIR>          Links
01/29/2016  12:06 PM    <DIR>          Music
12/24/2015  03:10 PM    <DIR>          OneDrive
02/03/2016  03:36 PM    <DIR>          Pictures
01/29/2016  12:06 PM    <DIR>          Saved Games
01/29/2016  12:06 PM    <DIR>          Searches
11/28/2014  10:14 PM    <DIR>          Shared
04/12/2015  03:23 PM    <DIR>          Tracing
01/29/2016  12:06 PM    <DIR>          Videos
               0 File(s)              0 bytes
              26 Dir(s)  480,478,224,384 bytes free

当我从路径中取出cygwin和mingw时，会发生此错误:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python27\lib\subprocess.py", line 566, in check_output
    process = Popen(stdout=PIPE, *popenargs, **kwargs)
  File "C:\Python27\lib\subprocess.py", line 710, in __init__
    errread, errwrite)
  File "C:\Python27\lib\subprocess.py", line 958, in _execute_child
    startupinfo)
WindowsError: [Error 2] The system cannot find the file specified

有没有办法使用 CMD 代替 Cygwin 命令？

提前致谢。

Answer 1

将 shell=True 传递给 check_output 似乎有效。我怀疑 dir 是作为内置 shell (cmd) 而不是独立的可执行文件实现的。