[issue18472] Update PEP 8 to encourage modern conventions

[Tshepang Lekhonkhobe]

Changes by Tshepang Lekhonkhobe <tshepang at gmail.com>:


----------
nosy: +tshepang

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18472>
_______________________________________