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#6374: add a bit of explanation about shell=True on Windows.

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Georg Brandl 2009-06-30 16:17:28 +00:00
parent 3d5c87a23c
commit 0d8649a1c9
1 changed files with 5 additions and 1 deletions
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Doc/library/subprocess.rst
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@ -73,7 +73,11 @@ This module defines one class called :class:`Popen`:
needed: Usually, the program to execute is defined by the *args* argument. If
``shell=True``, the *executable* argument specifies which shell to use. On Unix,
the default shell is :file:`/bin/sh`. On Windows, the default shell is
specified by the :envvar:`COMSPEC` environment variable.
specified by the :envvar:`COMSPEC` environment variable. The only reason you
would need to specify ``shell=True`` on Windows is where the command you
wish to execute is actually built in to the shell, eg ``dir``, ``copy``.
You don't need ``shell=True`` to run a batch file, nor to run a console-based
executable.
*stdin*, *stdout* and *stderr* specify the executed programs' standard input,
standard output and standard error file handles, respectively. Valid values