This post explains what a Python module is and how to use it to drastically extend the capabiltiies of your code. Plus: how to make your own!

Hidden or missing imports: Sometimes PyInstaller can’t detect the import of a package or library, typically because it is imported dynamically. In this case, you need to manually specify the ...

Python's ability to execute code at import presents three levels of risk to an enterprise: accidental risk, deliberate risk and external risk. Accidental risk is when a developer modifies or adds ...

Now I have this after reading about double imports and changing the code: from Tkinter import * import ttk and it works fine! So I guess I have to watch for double imports.