What are some common mistakes with default arguments in Python?

What are some common mistakes with default arguments in Python?

One common mistake is using mutable default arguments like lists or dictionaries, which can lead to unexpected behavior.

Can you give me an example of that?

Sure! If you use a list as a default argument and modify it, the change will persist across function calls.

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.

Are there any other pitfalls I should be aware of?

Yes, another pitfall is not realizing that default arguments are evaluated once when the function is defined, not each time it's called.