Can I force pip to reinstall the current version?

pip install –upgrade –force-reinstall

When upgrading, reinstall all packages even if they are already up-to-date.
pip install -I pip install –ignore-installed

Ignore the installed packages (reinstalling instead).

You might want to have all three options: –upgrade and –force-reinstall ensures reinstallation, while –no-deps avoids reinstalling dependencies.
$ sudo pip install –upgrade –no-deps –force-reinstall

Otherwise you might run into the problem that pip starts to recompile Numpy or other large packages.