Standard (built-in) library

Python, when installed, has a basic set of functions that are referred to as the built-in library. These built-in tools allow Python to perform string manipulations, math computations, HTTP calls, and URL parsing along with many other functions. Some of the tool libraries, or modules, are available as soon as Python is started, while others must be explicitly called using the "import" keyword to make their functions and classes available. Other modules have been developed by third parties, and can be downloaded and installed onto the Python installation as needed.