piper: Easily set up shell pipelines in Python

Example

from piper import CommandPipeline
commands = [["command1", "arg"],
            ["command2", "arg"],
            ["command3", "arg", "another arg"]]
p = CommandPipeline(commands)
for line in p.stdout:
    print "Read a line: %s" % line
p.close()
if p.failed():
    raise Exception("Pipeline failed")

Installation

piper is distributed as a standard Python package. You can download the tarball here: https://github.com/DarwinAwardWinner/piper/tarball/master

Simply install it using your normal Python package installer. Probably pip or easy_install or setup.py.