I'm trying to use sh (https://pypi.python.org/pypi/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?
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