[issue9299] os.mkdir() and os.makedirs() add a keyword argument to suppress "File exists" exception.

[Giampaolo Rodola']

Changes by Giampaolo Rodola' <g.rodola at gmail.com>:


----------
nosy: +giampaolo.rodola

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue9299>
_______________________________________