Pip Version Confusion

[Tim Johnson]

I'm on Ubuntu 16.04.

I'm getting the following message from pip:

You are using pip version 8.1.1, however version 9.0.3 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

# But then I get this :
tim at linus:~/Downloads$ which pip
/home/tim/.local/bin/pip

# and this:
tim at linus:~/Downloads$ pip --version
pip 9.0.3 from /home/tim/.local/lib/python2.7/site-packages (python 2.7)

Not sure how to resolve - please advise,
thanks

--
Tim