What is parameter passing in Python?

What is parameter passing in Python?

Parameter passing in Python refers to how arguments are passed to functions. There are mainly two types: pass by value and pass by reference.

Can you explain the difference between pass by value and pass by reference?

Sure! In pass by value, a copy of the variable is passed, so changes made inside the function do not affect the original variable. In pass by reference, a reference to the original variable is passed, allowing changes to affect the original.

How does Python handle parameter passing then?

Python uses a mechanism called 'pass by object reference'. This means that the reference to the object is passed, but the behavior depends on whether the object is mutable or immutable.

Can you give an example of mutable and immutable objects?

Certainly! Lists are mutable, meaning they can be changed after creation. Strings, on the other hand, are immutable; any modification creates a new string.