Error while upgrading to pip 7.1.10 on Windows 8.1 (python 2.7)

Question

$ C:\Python27> pip install --upgrade pip

You are using pip version 6.0.8, however version 7.1.0 is available.

You should consider upgrading via the 'pip install --upgrade pip' command.

Collecting pip from https://pypi.python.org/packages/py2.py3/p/pip/pip-7.1.0-py2.py3-none-any.whl#md5=b108384a762825ec20
345bb9b5b7209f

Using cached pip-7.1.0-py2.py3-none-any.whl
Installing collected packages: pip
  Found existing installation: pip 6.0.8
    Uninstalling pip-6.0.8:
      Successfully uninstalled pip-6.0.8

previous version of pip is gone but i get this exception after that :

  Rolling back uninstall of pip
  Exception:
  Traceback (most recent call last):


File "c:\python27\lib\site-packages\pip-6.0.8-py2.7.egg\pip\basecommand.py", line 232, in main status = self.run(options, args) 
                               .
                               .
                               .

  AttributeError: 'NoneType' object has no attribute 'bytes'

I have upgrade setuptools and distribute , also i tried to install pip manualy and got this :

$ C:\Python27> pip install 7.1.10
You are using pip version 6.0.8, however version 7.1.0 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Collecting 7.1.10
  Could not find any downloads that satisfy the requirement 7.1.10
  No distributions at all found for 7.1.10 

Answer 1

I was facing the same issue , then i consulted the pip documentation and this is how they have recommended to upgrade pip :

for Windows :

python -m pip install -U pip

for Linux :

pip install -U pip

For further reference check thisLink

Answer 2

This bugreport suggests doing

easy_install -U pip