练习题
#!/usr/bin/env python
# -*- coding:utf-8 -*-
""""""
# 1.请获取 "刘伟达"
"""
info = {"name":'刘伟达','age':18,'gender':'男','hobby':'同桌'}
v = info['name'] #通过键进行获取
print(v)
"""
# 2. 请输出所有键
"""
info = {"name":'刘伟达','age':18,'gender':'男','hobby':'同桌'}
for i in info.keys():
print(i)
"""
# 3. 请输出所有键和值
# v = "1+3"
# a,b = v.split('+') # [1,3] 将1赋值给a , 3赋值给b
# print(a,b)
# a,b = (1,3,)
# print(a,b)
# info = {"name":'刘伟达','age':18,'gender':'男','hobby':'同桌'}
# for a,b in info.items():
# print(a,b)
# 3. 请输出所有键和值,并让用户输入 name/age/gender/hobby，根据用户输入输出对应的值。
"""
info = {"name":'刘伟达','age':18,'gender':'男','hobby':'同桌'}
for k,v in info.items():
print(k,v)
key = input('请输入键：') # "name"
print(info[key]) # info["name"]
"""
# 4. 给你一个空字典，请在空字典中添加数据: k1:1,k2:2,k3:3
"""
info = {}
info['k1'] = "1"
info['k2'] = 2
info['k3'] = 3
print(info)
"""
# 5. 给你一个空字典，请让用户输入：key，value，将输入的key和value添加到字典中。
# info = {}
# k = input('请输入key：')
# v = input('请输入value：')
# info[k] = v
# print(info)
# 6. 给你一个空字典，请一直让用户输入：key，value，将输入的key和value添加到字典中，直到用户输入 N ，则表示不再输入。
"""
info = {}
while True:
k = input('请输入key：')
if k == 'N':
break
v = input('请输入value：')
info[k] = v
print(info)
"""
# 7. 请用代码实现
"""
message = "k1|v1,k2|v2,k3|123......." # ,k3|123
info = {'k1':'v1','k2':'v2','k3':'123'}
info = {}
message = "k1|v1,k2|v2,k3|123"
for item in message.split(','): # ["k1|v1","k2|v2","k3|123"]
v1,v2 = item.split('|')
info[v1] = v2
print(info)
"""
# 8. 数据类型嵌套：int/bool/str/list/tuple/dict
# li = [11,22,33,True,[11,2],(11,2,[11,22],33,),{'k1':'v1','k2':(11,22,3)}]
"""
info = {
'k1':'v1',
'k2':True,
'k3':1,
'k4':(11,22,33),
'k5':[11,22,33],
'k6':{'kk':'vv'},
1:{'kk':'vv'},
False:{'kk':'vv'},
# [11,2]:{'kk':'vv'}, # 不可哈希
(11,2):{'kk':'vv'},
# {'k1':'v2'}:{'kk':'vv'}, # 不可哈希
}
print(info)
"""
# data = [1, 2, {'k1': 1, 'k2': 2, 'k3': (11, 22, 33), 'k4': [1, (12, 3, 4), 2]}, 93]
# 获取3
# v = data[2]['k4'][1][1]
# print(v)
# 在k4对应的列表第0个位置插入一个 9
# data[2]['k4'].insert(0,9)
# print(data)
# 9. 创建出一个用户列表，然后让用户输入用户名和密码进行登陆。
"""
user_list = [
{'user':'alex','pwd':'123'},
{'user':'oldboy','pwd':'123'},
{'user':'lishaoqi','pwd':'1123'},
{'user':'liqihang','pwd':'123'},
{'user':'xxx','pwd':'123'}, # N
]
"""
# 构建用户列表
"""
user_list = []
while True:
u = input('请输入用户名：') # N
if u == "N":
break
p = input('请输入密码：')
# user_info = {}
# user_info['user'] = u
# user_info['pwd'] = p
user_info = {'user':u,'pwd':p}
user_list.append(user_info)
"""
"""
user_list = [{'user': 'alex', 'pwd': '123'}, {'user': 'oldboy', 'pwd': '123'}, {'user': 'lishaoqi', 'pwd': '123'}]
username = input('请输入用户名：') # oldboy
password = input('请输入密码：') # 123
message = "登陆失败"
for item in user_list:
if item['user'] == username and item['pwd'] == password:
message = '登陆成功'
break
print(message)
"""
# 10. 有序
# 有序：元组/列表
# 无序：字典（py3.6之后字典就是有序了）
