Python 2.7 pip

Resolving error on python 2.7 using pip: ImportError: No module named _internal

$wget https://pypi.python.org/packages/e7/a8/7556133689add8d1a54c0b14aeff0acb03c64707ce100ecd53934da1aa13/pip-8.1.2.tar.gz
$tar -xzvf pip-8.1.2.tar.gz
$cd pip-8.1.2
$sudo python setup.py install