Using a linter or code-checking tool, developers can check the consistency of variables ... sometimes Python can automatically infer what types are returned from a function, but if you plan ...

Python’s new template ... but to pass it to a function that will handle formatting duties. For instance, a simple template string handler to render each variable’s string representation ...

Post a runnable example that demonstrates the unwanted behavior. There are a number of different ways to cause that sort of thing in Python.