Guide to using python for bash-style scripting

Bill Pursell bill.pursell at gmail.com
Tue May 23 20:29:19 CEST 2006


4zumanga wrote:
> Yes, there is a stupid mistake in that script, last line should be:
>
> diff new_out1 new_out2
>
> However, this is hopefully not important, what is important is the
> general kind of (very simple) things I'm trying to do.

I have been hoping for a good solution to this.  An
easy way to handle simple commands is:

#!/usr/bin/env python

import os
s = "echo foo |  sed 's/foo/gap/' > file\n"
s += "wc -c file\n"
s += "cat file\n"

print s, "***"
os.system(s)
######## end

(Apologies for the lameness of the commands above).
However, I have some bash scripts that rely on
things like PIPESTATUS, and I have no idea
how to emulate that behavior easily.  How can one
most easily emulate a simple pipe as readily
as in bash?  I've seen a few recipes for doing something
like that, but I haven't yet seen one that i really
like.  Is it possible to execute:
os.system( " a | b | c | d | e")
and retrieve the value of PIPESTATUS?




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