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

The familiar formatted string, or f-string, feature in Python provides a convenient way to print variables as part ... but to pass it to a function that will handle formatting duties.

The solution is to use PyObject_CallObject() instead. This function allows you to pass a single tuple of Python objects instead of the variable-length list of native C data items. The downside here is ...

Improve your Python ... to test this function, you'll need to pass it a file-like object. In my last article, I showed how you could use a StringIO object for such a thing, and that remains the case.