Using sh library with grep command

Peter Otten __peter__ at
Sat Nov 23 17:29:36 CET 2013

Luca wrote:

> I'm trying to use sh ( for calling
> system grep command but it's now working as expected.
> An example:
>     import sh
>     sh.grep('abc', os.getcwd(), '-r')
> But I get the ErrorReturnCode_1: exception, that I learned is the
> normal exit code for grep command when it not found any match.
> The error instance object reported that the command run is:
>     *** ErrorReturnCode_1:
>       RAN: '/usr/bin/grep abc /Users/keul/test_sh'
> Obviously manually running the command I get some output and exit code 0.
> Where I'm wrong?

Did you run grep with or without the -r option? 

The code sample and the error message don't match. Maybe you accidentally 
left out the -r in your actual code.

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