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Subprocesses for Humans 2.0.

Project description — Subprocesses for Humans 2.0

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**** is a simple library for dealing with subprocesses, inspired
by both `envoy <>`_ and `pexpect <>`_ (in fact, it depends on it!).

This module features two main functions ```` and ``delegator.chain()``. One runs commands, blocking or non-blocking, and the other runs a chain of commands, separated by the standard unix pipe operator: ``|``.

If you're interested in financially supporting Kenneth Reitz open source, consider `visiting this link <$KennethReitz>`_. Your support helps tremendously with sustainability of motivation, as Open Source is no longer part of my day job.

Basic Usage

Basic run functionality:

.. code:: pycon

>>> c ='ls')
>>> print c.out

>>> c ='long-running-process', block=False)
>>> c.block()
>>> c.return_code

Commands can be passed in as lists as well (e.g. ``['ls', '-lrt']``), for parameterization.

Basic chain functionality:

.. code:: pycon

# Can also be called with ([['fortune'], ['cowsay']]).
# or,'fortune').pipe('cowsay')

>>> c = delegator.chain('fortune | cowsay')
>>> print c.out
/ Our swords shall play the orators for \
| us. |
| |
\ -- Christopher Marlowe /
\ ^__^
\ (oo)\_______
(__)\ )\/\
||----w |
|| ||

Expect functionality is built-in too, on non-blocking commands:

.. code:: pycon

>>> c.expect('Password:')
>>> c.send('PASSWORD')
>>> c.block()

Other functions:

.. code:: pycon

>>> c.kill()
>>> c.send('SIGTERM', signal=True)

# Only available when block=True, otherwise, use c.out.
>>> c.err

# Direct access to pipes.
>>> c.std_err
<open file '<fdopen>', mode 'rU' at 0x10a5351e0>

# Adjust environment variables for the command (existing will be overwritten).
>>> c = delegator.chain('env | grep NEWENV', env={'NEWENV': 'FOO_BAR'})
>>> c.out



$ pip install


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