What's shallow and deep copy

Question

Accepted Answer

Shallow copy creates a new object with the same reference as the original, while deep copy creates a new object with a new reference.

Shallow copy only copies the reference to the original object, so changes made to the copy will affect the original object.
Deep copy creates a new object with a new reference, so changes made to the copy will not affect the original object.
In Python, shallow copy can be made using the copy() method, while deep copy can be made using the deepcopy() method from the copy module.

Accepted Answer

Shallow copy creates a new object with the same reference as the original, while deep copy creates a new object with a new reference.

Shallow copy only copies the reference to the original object, so changes made to the copy will affect the original object.
Deep copy creates a new object with a new reference, so changes made to the copy will not affect the original object.
In Python, shallow copy can be made using the copy() method, while deep copy can be made using the deepcopy() method from the copy module.
>>> original_list = [1, 2, 3]
>>> shallow_copy_list = original_list[:]
>>> deep_copy_list = copy.deepcopy(original_list)
>>> shallow_copy_list[0] = 4
>>> print(original_list)
[1, 2, 3]
>>> print(shallow_copy_list)
[4, 2, 3]
>>> deep_copy_list[0] = 5
>>> print(original_list)
[1, 2, 3]
>>> print(deep_copy_list)
[5, 2, 3]

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