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How to fix Python PIP issues in OS X 10.8 Mountain Lion

If you’ve recently upgraded to Mountain Lion and you’re trying to run the Python installer pip but you get an error message like this:

sudo easy_install -U pip

then you need to upgrade your version of pip to the latest. Fire up Terminal and enter this:

Traceback (most recent call last):
File "/usr/local/bin/pip", line 5, in <module>
from pkg_resources import load_entry_point
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 2603, in <module>
working_set.require(__requires__)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 666, in require
needed = self.resolve(parse_requirements(requirements))
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 565, in resolve
raise DistributionNotFound(req)  # XXX put more info here
pkg_resources.DistributionNotFound: pip==1.1

Additionally, make sure you have the latest Xcode (v4.4) with Command Line Tools package installed.