练习8

1100-北京市,1200-天津市,1300-河北省石家庄市,1400-河南省洛阳市

dict_1 =

for key, value in dict_1.items():

print(key,value)

dict_1["1500"] = "内蒙古呼和浩特市"

print(dict_1)

num_1 = input("请输入你想删除的省市编码")

dict_1.pop(num_1)

print(dict_1)

num_2 = input("请输入你要修改的省市编码")

num_3 = input("请输入修改后的编码")

num_4 = input("请输入修改后的省市")

dict_1.pop(num_2)

dict_1[num_3] = num_4

print(dict_1)

num_5 = input("请输入想要查询省市的编码")

print(dict_1.get(num_5))