why is the size of the second list less than the first

Question

import sys

a = [1, 2, 3, 4, 5]
b = a[:]
print (sys.getsizeof(a)) # 120
print(sys.getsizeof(b)) # 96

Answer 1

1. b = [:] is invalid syntax
Did you mean b = a[:]?
2. If so, both are 96 when I check them

Answer 2

1. Yes, I forgot 'a'. Thank you)
2. In PyCharm 120 is displayed, and in SoloLearn 96

Answer 3

Aibek Zhaisanbay
Try running it in idle or the python shell

Answer 4

I thought it was a Python feature. Thank you a lot)