`pip install --upgrade` reports wrong version on success

When upgrading, pip reports that it “Successfully installed” the version it just upgraded from.

Actual upgrade seems to have succeeded, it’s just the success message is wrong.

$ pip install --upgrade pip
Collecting pip from https://pypi.python.org/packages/py2.py3/p/pip/pip-6.0.7-py2.py3-none-any.whl#md5=9a7ea5d89062613887b75e01e5d82c36
  Using cached pip-6.0.7-py2.py3-none-any.whl
Installing collected packages: pip
  Found existing installation: pip 6.0.6
    Uninstalling pip-6.0.6:
      Successfully uninstalled pip-6.0.6

Successfully installed pip-6.0.6
$ pip --version
pip 6.0.7 from /usr/local/lib/python2.7/site-packages (python 2.7)

[cviner]

That was my initial suspicion, but it doesn’t seem to account for the concluding message of the pip install --user --upgrade pip command: Successfully installed pip-6.0.7. Unless that message is actually checking the pip version itself and therefore running into the issue you described. However, I would expect pip to be able to upgrade itself in user mode and report the correct upgraded version upon completion (even if a subsequent pip command does not use the upgraded pip without my manually setting PYTHONPATH).

[xavfernandez]

Hopefully fixed by #3723