Python Copy objects (deep copy deepcopy and shallow copy copy)

1. Copy.copy a shallow copy copies only the parent object and does not copy the inner sub-objects of the object.
2. copy.deepcopy deep copy copy objects and their sub-objects
A good example:

Import Copya = [1, 2, 3, 4, [' A ', ' B ']]  #原始对象b = a  #赋值, reference to the object c = Copy.copy (a)  #对象拷贝, shallow copy d = Copy.deepcopy (a) 
  #对象拷贝, deep copy a.append (5)  #修改对象aa [4].append (' C ')  #修改对象a中的 [' A ', ' B '] Array object print ' A = ', aprint ' B = ', bprint ' C = ', CP Rint ' d = ', D

Output Result:
A = [1, 2, 3, 4, [' A ', ' B ', ' C '], 5]
b = [1, 2, 3, 4, [' A ', ' B ', ' C '], 5]
c = [1, 2, 3, 4, [' A ', ' B ', ' C ']]

D = [1, 2, 3, 4, [' A ', ' B ']]