Python

Python deep copy via copy.deepcopy()

You can use copy.deepcopy() to create a copy of a compound object.

deepcopy creates a copy of the object and of all its nested objects. Changes to the original object won't affect the copied object since new objects are created instead of just referencing.

import copy

house = {
    "width": 12,
    "length": 8,
    "height": 3.5,
    "doors": [
        {"type": " ENTRANCE", "width": 0.9, "height": 2.2},
        {"type": "BACK DOOR", "width": 0.7, "height": 2.0},
    ],
}

same_house = copy.deepcopy(house)
print(house)
print(same_house)
print(house == same_house)

"""
{'width': 12, 'length': 8, 'height': 3.5, 'doors': [{'type': ' ENTRANCE', 'width': 0.9, 'height': 2.2}, {'type': 'BACK DOOR', 'width': 0.7, 'height': 2.0}]}
{'width': 12, 'length': 8, 'height': 3.5, 'doors': [{'type': ' ENTRANCE', 'width': 0.9, 'height': 2.2}, {'type': 'BACK DOOR', 'width': 0.7, 'height': 2.0}]}
True
"""

house["height"] = 4.0
print(house)
print(same_house)
print(house == same_house)

"""
{'width': 12, 'length': 8, 'height': 4.0, 'doors': [{'type': ' ENTRANCE', 'width': 0.9, 'height': 2.2}, {'type': 'BACK DOOR', 'width': 0.7, 'height': 2.0}]}
{'width': 12, 'length': 8, 'height': 3.5, 'doors': [{'type': ' ENTRANCE', 'width': 0.9, 'height': 2.2}, {'type': 'BACK DOOR', 'width': 0.7, 'height': 2.0}]}
False
"""