pip is the standard package management tool for Python.

Install a package:

pip install <package-name>
pip install '<package-name>==1.0'

Install a list of packages from a file:

pip install -r <requirements-file>

Uninstall a package:

pip uninstall <package-name>

List all installed packages:

pip list

Check information about an installed package:

pip show <package-name>

Save installed packages to file:

pip freeze > <file-name>

Search for a package:

pip search <query>