[jdbowman]

You would need some kind of code obfuscation (and then you could sell the license key to unlock the code). Could use something like https://github.com/dashingsoft/pyarmor perhaps.

But, instead of this unwieldy approach, would you consider monetizing with product support, training, etc.?

[busymichael]

Thank you -- pyarmor is what I am looking for. It seems to provide for both code obfuscation AND licensing. Also, if you use the licensing, the code obfuscation is linked to the license, so you can easily track back code leaks.