python基础 Day01 练习题

1 字符串格式化

 #!/urs/bin/env python

 name = input("Name: ")
 age = int(input("Age: "))
 job = input("Job: ")
 salary = input("Salary: ")

 info1 = """

 ----------- info1 of %s ---------
 name: %s
 age: %s
 job: %s
 Salary: %s
 """ % (name, name, age, job, salary)

 print(info1)

 info2 = """

 ----------- info2 of {_name} ----
 Name: {_name}
 Age: {_age}
 Job: {_job}
 Salary: {_salary}
 """.format(_name=name,
            _age=age,
            _job=job,
            _salary=salary)

 print(info2)

 info3 = """

 ------ info3 of {0} -------
 Name: {0}
 Age: {1}
 Job: {2}
 Salary: {3}
 """.format(name, age, job, salary)

 print(info3)

2 密码非明文显示

 #!/urs/bin/env python
 # -*- coding:utf-8 -*-

 import getpass
 username = input("username:")
 password = getpass.getpass("password:")

 print(username)
 print(password)

注在Pycharm中不可以，在命令行模式运行：python xxx.py可以

 模拟登陆：
1. 用户输入帐号密码进行登陆
2. 用户信息保存在文件内
3. 用户密码输入错误三次后锁定用户 

 #!/urs/bin/env python
 # -*- coding:utf-8 -*-

 lock_users = []
 f0 = open("lock_users.db", encoding="utf-8")
 for line in f0.readlines():
     line = line.strip()
     lock_users.append(line)
 f0.close()

 users_list = []
 f1 = open("users.db", "r",  encoding="utf-8")
 for line in f1.readlines():
     line = line.strip().split()
     users_list.append(line[0])
     users_list.append(line[1])
 f1.close()

 times = 3

 for i in range(times):
     username = input("Enter your name:")
     password = input("Enter your password:")

     if username in lock_users:
         print("\tSorry, you're locked now. Please contact administrators.")
         break

     if username in users_list and password == users_list[users_list.index(username) + 1]:
         print("\tWelcome %s login !" % username)
         break
     else:
         print("\tusername or password is wrong.")

     if i == times-1:
         f2 = open("lock_users.db", "a+", encoding="utf-8")
         f2.write("\n")
         f2.write(username)
         f2.close()
         print("\t{}, you're locked!".format(username))

三级菜单：
1. 运行程序输出第一级菜单
2. 选择一级菜单某项，输出二级菜单，同理输出三级菜单
3. 菜单数据保存在文件中
4. 让用户选择是否要退出
5. 有返回上一级菜单的功能
评分标准：
用多层嵌套while循环的方式完成作业2，85分
只用一层循环完成作业2，100分

 #!/urs/bin/env python
 # -*- coding:utf-8 -*-

 data ={
     '北京':{
          '海淀区':{
              '颐和园', '圆明园遗址公园', '旧土城遗址公园', '大钟寺'
          },
         '东城区':{
             '劳动人民文化宫', '老舍纪念馆', '柳荫公园', '青年湖公园'
         },
         },
     '浙江':{
         '杭州':{
             '西湖', '西溪湿地', '宋城', '钱塘江', '南宋御街',
         },
         '绍兴':{
             '柯岩风景区、大禹陵、东湖、鲁迅故里',
         },
         },
     '山东':{
         '济南':{
             '趵突泉 大明湖 千佛山 芙蓉街(小吃街)',
         },
         '青岛':{
             '栈桥,小鱼山,海底世界,第一海水浴场,八大关风景区, 花石楼',
         },
         },
 }

 flag = True

 while flag:
     for i in data:
         print(i)
     choose1 = input(">")

     if choose1 == "q":
         flag = False

     while flag:
         for j in data[choose1]:
             print("\t", j)

         choose2 = input(">>")
         if choose2 == 'b':
             break
         elif choose2 == 'q':
             flag = False

         while flag:
             for k in data[choose1][choose2]:
                 print("\t\t",k)

             choose3 = input(">>>")
             if choose3 == 'b':
                 break
             elif choose3 == 'q':
                 flag = False

 #!/urs/bin/env python
 # -*- coding:utf-8 -*-

 menu = {
     '北京':{
         '海淀':{
             '五道口':{
                 'soho':{},
                 '网易':{},
                 'google':{}
             },
             '中关村':{
                 '爱奇艺':{},
                 '汽车之家':{},
                 'youku':{},
             },
             '上地':{
                 '百度':{},
             },
         },
         '昌平':{
             '沙河':{
                 '老男孩':{},
                 '北航':{},
             },
             '天通苑':{},
             '回龙观':{},
         },
         '朝阳':{},
         '东城':{},
     },
     '上海':{
         '闵行':{
             "人民广场":{
                 '炸鸡店':{}
             }
         },
         '闸北':{
             '火车战':{
                 '携程':{}
             }
         },
         '浦东':{},
     },
     '山东':{},
 }

 exit_flag = False
 current_layer = menu

 layers = [menu]

 while not  exit_flag:
     for k in current_layer:
         print(k)
     choice = input(">>:").strip()
     if choice == "b":
         current_layer = layers[-1]
         #print("change to laster", current_layer)
         layers.pop()
     elif choice not  in current_layer:continue
     else:
         layers.append(current_layer)
         current_layer = current_layer[choice]

最多可连续3次猜年龄

 #!/urs/bin/env python
 # -*- coding:utf-8 -*-

 """
 最多可连续3次猜年龄
 """
 """
 _age = 56
 count = 3

 while count > 0:
     age = int(input("age = "))
     if age == _age:
         print("You're right.")
         break
     elif age > _age:
         print("think smaller ... ")
     else:
         print("think bigger ... ")
     count -= 1
 else:
     print("Sorry, there's not times for you.")
 """

 _age = 56

 for i in range(3):
     age = int(input("age = "))
     if age == _age:
         print("You're right.")
         break
     elif age > _age:
         print("think smaller ... ")
     else:
         print("think bigger ... ")
 else:
     print("Sorry, there's not times for you.")

可参看网址：

http://www.cnblogs.com/alex3714/articles/5717620.html