Small tool to interact with shell and pipes
Project description
Chut!
Chut is a small tool to help you to interact with shell pipes and commands.
Basically it will help to write some shell script in python
This is more like a toy than a real tool but… It may be useful sometimes.
It’s tested with py2.6+ and py3.2+:
Full documentation can be found here
Installation
Using pip:
$ pip install chut
This will also install docopt and allow you to use the @console_script decorator.
Quick start
Import the shell:
>>> import chut as sh
Get a file content if it contains “Chut”:
>>> grep_chut = sh.cat('README.rst') | sh.grep('Chut')
>>> if grep_chut:
... print(grep_chut | sh.head("-n1"))
Chut!
Redirect output to a file:
>>> ret = (grep_chut | sh.head("-n1")) > '/tmp/chut.txt'
>>> ret.succeeded
True
>>> print(sh.cat('/tmp/chut.txt'))
Chut!
Or to stdout:
>>> sh.cat('/tmp/chut.txt') > 1 # doctest: +SKIP
Chut!
Redirect both stdout and stderr to stdout:
>>> sh.cat('/tmp/chut.txt') > 2 # doctest: +SKIP
Chut!
Run many command with a pool of processes:
>>> [ret.succeeded for ret in sh.ls.map(['.', ['-l', '/tmp']])] [True, True]
Use docopt to write a console script. This script will take an iface as argument and return a code 1 if no address is found:
>>> @sh.console_script
... def got_inet_addr(args):
... """Usage: got_inet_addr <iface>"""
... if sh.ifconfig(args['<iface>']) | sh.grep('inet addr:'):
... return 1
>>> if __name__ == '__main__':
... got_inet_addr()
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