Question

How to make deep copy array (copy all contents by value) in Python

Answer 1

arr = [1, 2, 3, 4]
b = arr.copy()
print("arr = ", arr, " b = ", b)

arr.append(5)
print("arr = ", arr, " b = ", b)


'''
run:

arr =  [1, 2, 3, 4]  b =  [1, 2, 3, 4]
arr =  [1, 2, 3, 4, 5]  b =  [1, 2, 3, 4]

'''

 

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Answer 2

import copy

arr = [1, 2, 3, 4]
b = copy.deepcopy(arr)
print("arr = ", arr, " b = ", b)

arr.append(5)
print("arr = ", arr, " b = ", b)


'''
run:

arr =  [1, 2, 3, 4]  b =  [1, 2, 3, 4]
arr =  [1, 2, 3, 4, 5]  b =  [1, 2, 3, 4]

'''

 

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