Question

How to copy list in Python

Answer 1

list1 = [2, 4, 6, 9]

list2 = list1

list2[0] = 999

print(list1)
print(list2)


'''
run:

[999, 4, 6, 9]
[999, 4, 6, 9]

'''

 

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Answer 2

list1 = [2, 4, 6, 9]

list2 = list1[:]

list2[0] = 999

print(list1)
print(list2)


'''
run:

[2, 4, 6, 9]
[999, 4, 6, 9]

'''

 

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Answer 3

list1 = [2, 4, 6, 9]

list2 = []
list2.extend(list1)

list2[0] = 999

print(list1)
print(list2)


'''
run:

[2, 4, 6, 9]
[999, 4, 6, 9]

'''

 

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