call shell from python

Date	2013-02-12 13:13 +0800
Subject	call shell from python
From	contro opinion <contropinion@gmail.com>
Newsgroups	comp.lang.python
Message-ID	<mailman.1684.1360646021.2939.python-list@python.org> (permalink)

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>>> import os
>>> os.system("i=3")
0
>>> os.system("echo $i")

0
how can i get the value of  i?

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call shell from python contro opinion <contropinion@gmail.com> - 2013-02-12 13:13 +0800
  Re: call shell from python spilcm@hotmail.com - 2013-02-12 02:30 -0800
  Re: call shell from python spilcm@hotmail.com - 2013-02-12 02:30 -0800

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