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  1. a = [1, 2, [3, 4]]  
  2. b = a.copy()         # или b = a[:]  
  3.  
  4. a[0] = 99            # b не изменится  
  5. a[2][0] = 99         # b[2][0] тоже изменится!
Success #stdin #stdout 0.11s 14132KB
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https://ideone.com/3K24vT
language:
Python 3 (python  3.12)
created:
18 hours ago
visibility:
public

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