Learn how to install Python3 (3.9) & PIP on Ubuntu (and other Linux versions). PIP is a package manager for Python-based software, but PIP actually is a recursive acronym for ‘PIP installs Python’ or ‘PIP install packages’. Using PIP, we can install or uninstall the Python-based packages along with their required dependencies. Many of the packages can also be found at PyPI (Python Package Index).