I upgraded from Ubuntu 18.04 to Ubuntu 20.04. Python3.6 disappeared and python3.8 was automatically installed. I am now having trouble using numpy and pandas with python3.8. Attempts to install them are met with a message that they are already installed. However, running python3.8 software that attempts to import them fails with a message that they are not there. I happen to still have a version of python 3.5, which works fine with numpy and pandas. How do I convince python 3.8 that numpy and pandas are really there? I have tried to uninstall numpy and pandas with pip3, thinking that I could fix everything by reinstalling them, but the uninstall command is met with a message that they are not there. I also happen to have a version of python 3.9, and it also has difficulty finding numpy and pandas. There is something strange with my installation of python3.8 and I would like to get it fixed. Any suggestions would be helpful.
31 Answer
Looks like you are trying to install with pip3. The problem might be that pip3 is installing for python3.5. I think you want it for python3.8. For installing a library, say numpy with python3.8, do this:
python3.8 -m pip install numpyor if you want to install it for all your users
sudo python3.8 -m pip install numpyThis should do the trick.
