find it, looks for proxy information from Mac OSX System Configuration for
Mac OS X and Windows Systems Registry for Windows.
+.. note::
+ urllib also exposes certain utility functions like splittype, splithost and
+ others parsing url into various components. But it is recommended to use
+ :mod:`urlparse` for parsing urls than using these functions directly.
+ Python 3 does not expose these helper functions from :mod:`urllib.parse`
+ module.
+
URL Opener objects
------------------