Using popen in windows
Gordon McMillan
gmcm at hypernet.com
Thu Apr 20 08:05:39 EDT 2000
Robert Cragie wrote:
> I tried the following in Windows 98 as an experiment:
>
> from win32pipe import popen
> p = popen('dir','r')
> str = p.read()
> print str
>
> It just hangs when trying to do the read, and I have to kill the shell off.
> I have tried IDLE 0.5 and PythonWin and the 'DOS' command line, both do the
> same. I am using Python 1.5.2, and the win32pipe.pyd DLL is dated 3rd May
> 1999.
>
> I have done the equivalent on Linux and it works fine:
>
> from os import popen
> p = popen('ls','r')
> str = p.read()
> print str
>
> Anyone got any ideas?
Ah, but it's not equivalent :-). 'dir' is a cmd.exe builtin, not an
"external program". You can't (directly) popen any of the
cmd.exe builtins (and the list changes with each OS release).
on-Windows-you-gotta-think-diphpherent-ly y'rs
- Gordon
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