[FRPythoneers] Shell commands in interactive mode

Eric Brunson brunson at level3.net
Wed Jul 25 13:12:26 MDT 2001


Try reading about commands module and see if that does what you need
it to do.

http://python.org/doc/current/lib/module-commands.html

* cary miller (cmiller at math.cudenver.edu) [010725 13:06]:
> Hi
> 
> In tcl interactive mode you have access to shell commands like pwd and
> ls.  I wanted python to do that and came up with the following.  This
> code goes in pythonstartup.  The nice thing about it is that you just
> type
> >>> ls
> or
> >>> pwd
> and get exactly what you would see if you typed the same in the shell.
> 
> Problems:
>     1.  Blank line after the output.  The problem here is __repr__ is
>     required to return a string.  Is there any way around this?
> 
>     2.  Only works for one-word commands.  Cannot pass options to ls,
>     and cannot do this
> 
> >>> cat foo.py
> 
>     Is there a way to do multiword shell commands??
> 
> import os
> 
> class ShellCommand:
>     def __init__(self,cmd):
>         self.cmd=cmd
>     def __repr__(self):
>         eval('os.system(self.cmd)')
>         return ''
> 
> pwd = ShellCommand('pwd')
> ls = ShellCommand('ls')
> 
> 
> Here is the best I aan come up with for cat.
> 
> 
> def cat(file):
>     for line in open(file).readlines():
>         print line,
> 
> 
> 
> -- 
> Cary Miller
> Math Deparment
> University of Colorado - Denver
> cmiller at math.cudenver.edu
> http://www-math.cudenver.edu/~cmiller
> 
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-- 
Eric Brunson - brunson at level3.net - page-eric at level3.net  

"When governments fear the people there is liberty. When the people
fear the government there is tyranny." - Thomas Jefferson



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