浅copy与深copy举例

 例1： 

#!/usr/bin/env python
import copy
d1 = {'x':1,'y':2,'z':[3,4.5]}
d2 = d1
d3 = d1.copy()
d4 = copy.copy(d1)
d5 = copy.deepcopy(d1)
d1['x'] = 'm'
d1['z'][0] = 9
print(d1)
print(d2)
print(d3)
print(d4)
print(d5)

  输出结果：

 例2：

#!/usr/bin/env python
import copy
l1 = [1,2,[3.4,5]]
l2 = l1[:]
l3 = l1
l4 = copy.copy(l1)
l5 = copy.deepcopy(l1)
l1[0] = 'a'
l1[2][0] = 3
print(l1)
print(l2)
print(l3)
print(l4)
print(l5)

 输出结果：