#this is Shallow copy a=[1, 2, 3] b=a a[0] = 38 print(a, b) print(id(a), id(b)) #[38, 2, 3] [38, 2, 3] #4320547040 4320547040 #this is deep copy b = a[:] print(id(a), id(b)) #4320427976 4320427472 a[0] = 50; print(a, b) #[50, 2, 3] [38, 2, 3] import copy a=[1,2,3] b = copy.deepcopy(a) a[0] = 38 print(a, b) [38, 2, 3] [1, 2, 3]
1/22/2014
(Python study) deep copy and shallow copy (example source code)
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