>>>a = {1: [1,2,3]}
>>> b = a.copy()
>>> a, b
({1: [1, 2, 3]}, {1: [1, 2, 3]})
>>> a[1].append(4)
>>> a, b
({1: [1, 2, 3, 4]}, {1: [1, 2, 3, 4]})

>>>import copy
>>> c = copy.deepcopy(a)
>>> a, c
({1: [1, 2, 3, 4]}, {1: [1, 2, 3, 4]})
>>> a[1].append(5)
>>> a, c
({1: [1, 2, 3, 4, 5]}, {1: [1, 2, 3, 4]})

import copy
a = [1, 2, 3, 4, ['a', 'b']] #原始對(duì)象
b = a                       #賦值，傳對(duì)象的引用
c = copy.copy(a)            #對(duì)象拷貝，淺拷貝
d = copy.deepcopy(a)        #對(duì)象拷貝，深拷貝
a.append(5)                 #修改對(duì)象a
a[4].append('c')            #修改對(duì)象a中的['a', 'b']數(shù)組對(duì)象
print( 'a = ', a )
print( 'b = ', b )
print( 'c = ', c )
print( 'd = ', d )