ImportError: No module named pkg_resources after I upgrade python from 2.6.6 to 2.7.3

Question

When I run pip install xxx or easy_install xxx , I met this problem after upgrading Python from 2.6.6 to 2.7.3:

Traceback (most recent call last):
File "/usr/bin/pip", line 5, in <module>
from pkg_resources import load_entry_point
ImportError: No module named pkg_resources

Could someone give me some advice ?

Answer 1

first try to run python26 or python27 to see what happening.

check if setting PYTHONPATH in shell. unset it!

or set it PYTHONPATH=/usr/lib/python2.7:/usr/lib/python2.7/site-packages/