对于数字和字符串来说，无论是‘’赋值‘’还是‘’深拷贝‘’还是‘’浅拷贝‘’都是指向的同一个地址
深浅拷贝是copy类下的方法，创建方式为
import copy copy.copy() #浅拷贝 copy.deepcopy() #深拷贝
浅拷贝:
只拷贝一层
import copy
dic = {'k1' : 'nihao','k2' : 23,'k3' : ['hello', 89, ]}
print(id(dic))
dic1 = dic
print(id(dic1))
dic2 = copy.copy(dic)
print(id(dic2))
print(id(dic['k3'])) #查看字典第二层的地址
print(id(dic2['k3']))
结果：
5012504
5012504
5012576
33180616
33180616
深拷贝：
深层全部都拷贝
import copy
dic = {'k1' : 'nihao','k2' : 23,'k3' : ['hello', 89, ]}
print(id(dic))
dic1 = dic
print(id(dic1))
dic2 = copy.deepcopy(dic) #深拷贝
print(id(dic2))
print(id(dic['k3']))
print(id(dic2['k3']))
结果：
31095832
31095832
31889304
32328648
32328840
浅拷贝更加节省内存