During Python setup, you’re offered the option to install the py launcher, a small executable that lets you select (via command-line flags) which version of Python to use for a given script.

It is Python’s package manager that allows you to install, upgrade, and manage Python libraries and packages easily. To install libraries, you need to run the following command. pip install ...

When installing Python on Windows, ... simply substitute py and its command-line switches for python or python3. ... here is the command typically used to upgrade pip by running it as a module: ...

It’s written in Python programming language and is executed as a command line to install, uninstall, or reinstall Python packages and their modules.