Python Launcher is a utility designed for Windows that facilitates the management of multiple Python versions on a single machine. Its primary feature is version management, enabling users to install and run different Python versions, such as Python 2.7 and Python 3.10, without conflicts. The launcher determines which version to execute based on predefined rules, ensuring seamless transitions between versions.

In addition to version management, Python Launcher supports Unix-style shebang lines in scripts, allowing developers to specify the target Python version directly within their code. It features a command-line interface for easy invocation and is registered as the default handler for .py and .pyw files, enabling straightforward execution of scripts via double-click in Windows Explorer. This integration makes it an essential tool for Python developers working in a Windows environment.