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Home Interviews What is the difference between deepcopy and shallowcopy? – MindStick
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1 Answers

ICSM Computer
ICSM Computer 27 Aug 2025
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Answer:

  • Shallow Copy → Copies only the references, so nested objects are still shared between the original and the copy.
  • Deep Copy → Creates a completely independent copy, including all nested objects, so changes in one won’t affect the other.
import copy
a = [[10, 20], [30, 40]]
shallow = copy.copy(a)
deep = copy.deepcopy(a)

a[0][0] = 990
print(shallow)  # [[990, 20], [30, 40]] (affected) 
print(deep)     # [[10, 20], [30, 40]] (not affected)
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