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Created on 2010-05-05 22:04 by Alex Quinn, last changed 2022-04-11 14:57 by admin. This issue is now closed.
| Messages (3) | |||
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| msg105091 - (view) | Author: Alex Quinn (Alex Quinn) | Date: 2010-05-05 22:04 | |
The documentation says subprocess replaces os.system(). However, subprocess does not handle built-in Windows shell commands as os.system() does.
Works:
- os.system("dir /w")
- subprocess.Popen("cmd /c dir /w", stdout=subprocess.PIPE).communicate()[0]
Does NOT work:
- Popen("dir /w", stdout=PIPE).communicate()[0]
- Popen(["dir", "/w"], stdout=PIPE).communicate()[0]
Examples:
s:\d>python31
Python 3.1.2 (r312:79149, Mar 21 2010, 00:41:52) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from subprocess import Popen, PIPE
>>> Popen(["cmd", "/c", "dir", "/w"], stdout=PIPE).communicate()[0]
..... (WORKED)
>>> Popen(["dir", "/w"], stdout=PIPE).communicate()[0]
dir: cannot access /w: No such file or directory
b'' (DIDN'T WORK)
>>>
|
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| msg105098 - (view) | Author: Philip Jenvey (pjenvey) *  |
Date: 2010-05-05 22:25 | |
shell commands don't work because you're not specifying the shell=True argument to Popen. This is covered in the subprocess "Replacing os.system" documentation |
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| msg105101 - (view) | Author: Alex Quinn (Alex Quinn) | Date: 2010-05-05 22:30 | |
Sorry. My mistake. Thanks for clarifying. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:57:00 | admin | set | github: 52878 |
| 2010-05-05 22:30:20 | Alex Quinn | set | messages: + msg105101 |
| 2010-05-05 22:25:22 | pjenvey | set | status: open -> closed nosy: + pjenvey messages: + msg105098 resolution: not a bug |
| 2010-05-05 22:04:24 | Alex Quinn | create | |