pip3: command not found but python3-pip is already installed
You can use python3 -m pip as a synonym for pip3. That has saved me a couple of times.
I had a similar issue. In my case, I had to uninstall and then reinstall pip3:
sudo apt-get remove python3-pip
sudo apt-get install python3-pip
Run
locate pip3
it should give you a list of results like this
/<path>/pip3
/<path>/pip3.x
go to /usr/local/bin to make a symbolic link to where your pip3 is located
ln -s /<path>/pip3.x /usr/local/bin/pip3
Same issue on Fedora 23. I had to reinstall python3-pip to generate the proper pip3 folders in /usr/bin/.
sudo dnf reinstall python3-pip