pip3

pip3 [command] [options] [packages...]

pip3 is the Python 3 package installer. Functionally identical to pip but explicitly targets the Python 3 environment. On systems with both Python 2 and Python 3, pip3 ensures packages install to the correct interpreter.
pip3 downloads packages from the Python Package Index (PyPI) by default. It handles dependency resolution, version constraints, and can install from local files, version control URLs, or requirements files. Use pip3 install -r requirements.txt to install from a requirements file.

install package

Install package.

Remove package.

List installed packages.

Output installed packages in requirements format.

Show package details.

Install to user site-packages.

Install from requirements file.

Use virtual environments (venv) to avoid system package conflicts. The --user flag installs to user directory without root. On some systems, using pip3 outside a virtual environment requires --break-system-packages flag.

pip was created by Ian Bicking in 2008 as a replacement for easy_install. It became the standard Python package installer, bundled with Python since version 3.4.

pip(1), python3(1)