Can I force pip to reinstall the current version?

Question

I\'ve come across situations where a current version of a package seems not to be working and requires reinstallation. But pip install -U won\'t touch a package

Answer 1

pip install --upgrade --force-reinstall <package>

When upgrading, reinstall all packages even if they are already up-to-date.

pip install -I <package>
pip install --ignore-installed <package>

Ignore the installed packages (reinstalling instead).

Answer 2

--force-reinstall

doesn't appear to force reinstall using python2.7 with pip-1.5

I've had to use

--no-deps --ignore-installed

Answer 3

In the case you need to force the reinstallation of pip itself you can do:

python -m pip install --upgrade --force-reinstall pip

Answer 4

If you want to reinstall packages specified in a requirements.txt file, without upgrading, so just reinstall the specific versions specified in the requirements.txt file:

pip install -r requirements.txt --ignore-installed

Answer 5

sudo pip3 install --upgrade --force-reinstall --no-deps --no-cache-dir <package-name>==<package-version>

Some relevant answers:

Difference between pip install options "ignore-installed" and "force-reinstall"

Answer 6

If you have a text file with loads of packages you need to add the -r flag

pip install --upgrade --no-deps --force-reinstall -r requirements.txt