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Exercise 9

my_list = [1, 2, 3, [4, 5, 6]]
another_list = list(my_list)

Given the above code, answer the following questions and explain your answers:

Are the lists assigned to my_list and another_list equal?
Are the lists assigned to my_list and another_list the same object?
Are the nested lists at index 3 of my_list and another_list equal?
Are the nested lists at index 3 of my_list and another_list the same object?

Don't write any code for this exercise.

Solution

The two lists are equal: they are both lists with the same elements.
The two lists are not the same object: The list constructor creates a new object.
The two nested lists are equal: they are both lists that have the same elements.
The two nested lists are the same object: the list constructor creates a shallow copy of the iterable passed as an argument. Shallow copies don't create new nested lists. Instead, only a reference to the nested list gets copied.

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