Timur Sufiev 7023050edd Eliminate mutable default arguments ...

The best practice in Python is not to use mutable object (i.e. list,
dictionary, or instances of most classes) as value of default
argument (see https://goo.gl/Kwhg0T). A hacking rule to enforce this 
practice is added as well.

The patch was inspired by CR https://review.openstack.org/#/c/198465/ 
and took most of its code from it as well. That's why original 
copyrights are kept.

Closes-Bug: #1471349
Change-Id: Ia77b1736dbc3d4e28ff2d2c3424e9cfcaefa5077

2015-12-17 09:58:46 +00:00

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