Why is PIP raising an AssertionError on pip freeze?

Question

My console:

desarrollador@desarrollador-HP-14-Notebook-PC1:~$ pip freeze  
Exception:  
Traceback (most recent call last):  
  File \"/usr/lib/python2.7/dist         


        

Answer 1

First, I ran Martin Mohan's solution:

/usr/local/bin/pip uninstall pip
apt-get remove python-pip
apt-get install python-pip

Then, boredcoding's ultimately fixed the problem, both solutions are found near bottom of thread: I screwed up the system version of Python Pip on Ubuntu 12.10

$apt-get install python-pip
$which pip
/usr/bin/pip

$pip install -U pip
$which pip
/usr/bin/pip

$hash -r
$which pip
/usr/local/bin/pip

The logic behind these two fix are stated in the thread (linked above), so I will refrain from going into each here.