Small tool to interact with shell and pipes
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
$ pip install chut
This will also install docopt and allow you to use the @console_script decorator.
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 stdout to stderr:
>>> 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()