pip is a Python package manager used to install, update, and remove software libraries from the Python Package Index and other remote repositories. It functions as a dependency resolver that calculates compatible version sets for complex software trees, an environment inspector for analyzing installed distributions, and a wheel builder that compiles source distributions into binary files.
The tool supports various installation methods, including fetching packages directly from web URLs and Git commits, as well as installing packages in editable mode for active development. It enables the creation of reproducible environments by freezing installed package versions into a structured list.
Its broader capabilities include binary wheel compilation, installation simulation, and package metadata inspection. The system also manages a local HTTP caching layer for distribution files and ensures secure network connections through SSL certificate verification.
Operational settings are managed via a hierarchy of command-line arguments, environment variables, and configuration files.