What are immutable default arguments in Python?

What are immutable default arguments in Python?

Immutable default arguments in Python are default values for function parameters that cannot be changed. Examples include tuples and strings.

Can you give me an example of how they work?

Sure! If you define a function like this: def func(arg1, arg2=[]): and modify arg2, it will retain changes across calls.

Why is it a problem to use mutable types as default arguments?

Using mutable types can lead to unexpected behavior, as the default value is shared across all calls to the function.

How can I avoid this issue?

You can use None as a default value and then initialize the mutable object inside the function if needed.