Before you can use Python, you need to install it. Some operating systems, such as macOS and some Linux variants, have Python preinstalled. Those versions of Python, colloquially called system Python, often make poor defaults for people who want to develop in Python.
The version of Python installed is often behind the latest practices. System integrators often patch Python in ways that can lead to surprises. For example, Debian-based Python is often missing modules like venv and ensurepip. macOS Python links against a Mac shim around its ...
