title: Create a single executable from a Python project
body: <p>I want to create a single executable from my Python project.  A user should be able to download and run it without needing Python installed.  If I were just distributing a package, I could use pip, wheel, and PyPI to build and distribute it, but this requires that the user has Python and knows how to install packages.  What can I use to build a self-contained executable from a Python project?</p>