How do I package my python code into an executable I can send to my friend who does not have python?

The easiest way to run Python, Spyder with SciPy and friends out of the box on any Windows PC...

Nuitka is a Python compiler.

Try nuitka BTW I have used the mentioned here pyinstaller, pex … last time I needed to this, nuitka worked flawlessly and better than pyinstaller.

Inno Setup is a free installer for Windows programs.

If you want an actual "installer", check out Inno Setup. It will take your WinPython or PyInstaller directory and install it like a real program, including creating shortcuts and all the rest if you want it to.