How can I copy a list in Python?

How can I copy a list in Python?

You can copy a list in Python using the copy() method or by using slicing. For example, new_list = old_list.copy() or new_list = old_list[:].

Is there a difference between using copy() and slicing?

Yes, both methods create a shallow copy, but copy() is more explicit. Slicing can be less readable for some.

What about copying nested lists?

For nested lists, you should use the copy.deepcopy() method from the copy module to avoid referencing the same inner lists.

Can you show me an example of copying a nested list?

Sure! Here's an example:

import copy
nested_list = [[1, 2], [3, 4]]
copied_list = copy.deepcopy(nested_list)