I have a question about function calls in Python. Say I want to write a function called superLongFunc(expr). The function is super long and really hard to debug. I want to split the function into smaller helper functions for better readability, to something like smallFunc1(expr),smallFunc2(expr), etc.
My question is, does this affect the performance of the code at all? How exactly does calling functions work in Python? Does Python pass the variables to a function by reference? Or does it make a copy of the variable before feeding it to the function?
I know it's a pretty nooby question but it's been bugging me for a while. Thanks in advance!