7.1练习题

# -*- coding:utf-8 -*-

# 面试题
# res = {}.fromkeys(['name','password','age'],[])  # {'name': [], 'password': [], 'age': []}
# print(res)
# res['name'] = 'llx'
# # res['password'].append('llx123')
# print(res)

# print(id(res['name']),id(res["password"])) # 2118494602216 2118747103304

d1 = {'name':'jason','age':18}
d2 = {'name':'egon'}
d1.update(d2)
print(d1,'1')
# for i,k in d1.items():
#     print(i,k)
#     pass
for i in d1:
    pass

list(d1)
print(d1,type(d1),id(d1),'2')

set(d1)
print(d1,type(d1),id(d1),'3')


s = 'hello world'
print(set(s)) # {'r', 'd', 'l', ' ', 'w', 'o', 'h', 'e'}