What is pass by reference in Python?

Can you explain what pass by reference means in Python?

In Python, all arguments are passed by object reference, meaning the reference to the object is passed, not the actual object.

So, if I modify a list inside a function, will it affect the original list?

Yes, if you modify the list inside the function, the changes will reflect in the original list since both refer to the same object.

What about immutable types like integers or strings?

For immutable types, if you try to modify them, a new object is created instead, leaving the original object unchanged.

Can you give me an example of this behavior?

Sure! If you pass a list and append an item, the original list changes. But if you pass an integer and try to change it, it won't affect the original.