1 count = 1
 2 while count <= 3:
 3     print(count)
 4     user = input(‘请输入您的姓名‘)
 5     psw = input(‘请输入您的密码‘)
 6     if user == ‘newboy‘ and psw == ‘pushu666‘:
 7          print(‘登陆成功‘)
 8          break
 9     else:
10         print(‘登陆失败‘)
11     if count == 3:
12         choice = input(‘请输入是否需要继续(Y/N):‘)
13         if choice == ‘Y‘:
14             count = 1
15             continue
16         elif choice == ‘N‘:
17              break
18         else:
19              print(‘输入错误‘)
20         break
21     count = count + 1

 1 count = 1
 2 while count <= 3:
 3     print(count)
 4     user = input(‘请输入您的用户名‘)
 5     psw = input(‘请输入您的密码‘)
 6     if user == ‘newboy‘ and psw == ‘pushu666‘:
 7         print(‘登陆成功‘)
 8         break
 9     else:
10         time = 3 - count
11         template = ‘密码或用户名错误，您还剩余%s次机会。‘ %(time,)
12         print(template)
13     count = count + 1

 1 count = 2
 2 while count >= 0:
 3     user = input(‘请输入您的用户名‘)
 4     psw = input(‘请输入您的密码‘)
 5     if user == ‘newboy‘ and psw == ‘pushu666‘:
 6         print(‘欢迎登陆‘)
 7         break
 8     template = ‘密码或用户名错误，您还剩余%s次机会。‘ % (count,)
 9     print(template)
10     count -= 1
11 else:

1 ount = 1
2 while count <= 10:
3     fen = int(input(‘请第%s号评委打分：‘ % (count,)))
4     if fen > 10 or fen <0:
5         print(‘请重新输入！‘)
6         continue
7     else:
8         print(‘第%s为评委打分为:%s‘% (count, fen,))
9     count += 1

1 # 输出所有键值，并且根据输入的键输出相应的值：
2 info = {‘name‘: ‘卡戴珊‘, ‘age‘: 18, ‘gender‘: ‘女‘, ‘hobby‘: ‘同志‘}
3 for k, v in info.items():
4     print(k, v)
5     key = input(‘请输入属性：‘)
6 print(info[key])

1 # 给出一个空字典，在字典中加入相应的键值k1=1,k2=2,k3=3.
2 info = {}
3 info[‘k1‘] = ‘1‘  # 此时加入的k1的值为字符串，而k2,k3为数字
4 info[‘k2‘] = 2
5 info[‘k3‘] = 3
6 print(info)

1 # 给出一个空字典，在字典中加入用户输入的key和value：
2 info = {}
3 k = 0 
4 while k <= 3:
5     key = input(‘请输入key:‘)
6     value = input(‘请输入value:‘)
7     info[key] = value
8     k = k + 1
9 print(info)

1 # 请用代码实现 ‘k1|v1, k2|v2, k3|v3, k4|v4‘ ---> {‘k1‘:‘v1‘, ‘k2‘:‘v2‘, ‘k3‘:‘v3‘, ‘k4‘:‘v4‘}
2 
3 info = {}
4 message = ‘k1|v1,k2|v2,k3|v3,k4|v4‘
5 for i in message.split(‘,‘):
6     v1, v2 = i.split(‘|‘)
7     info[v1] = v2
8     print(info)

 1 # 构建用户列表，然后让用户进行登陆验证
 2 """
 3 user_list = []
 4 while True:
 5     k = input(‘请输入用户名：‘)
 6     if k == ‘N‘:
 7         break
 8     v = input(‘请输入密码：‘)
 9     info = {}
10     info[‘user‘] = k
11     info[‘psw‘] = v
12     user_list.append(info)
13 print(user_list)
14 username = input(‘请输入登陆名：‘)
15 password = input(‘请输入用户密码：‘)
16 message = ‘登陆失败‘
17 for items in user_list:
18     if items[‘user‘] == username and items[‘psw‘] == password:
19         message = ‘登陆成功‘
20         break
21 print(message)

 1 #  将11,22,33,44,55,66,77,88,99,111中大于66的数字存放在字典键k1下，其余存在k2下
 2 """
 3 li = [11, 22, 33, 44, 5, 66, 77, 88, 99, 111]
 4 dic = {‘k1‘:[], ‘k2‘:[]}
 5 for i in li:
 6     if i == 66:
 7         continue
 8     elif i > 60:
 9         dic.setdefault(‘k1‘).append(i) #如果default中没有value就只进行查询操作
10     else:
11         dic.setdefault(‘k2‘).append(i)
12 print(dic)

 1 # 购物车
 2 goods = [{‘name‘: ‘电脑‘, ‘price‘:1999},
 3          {‘name‘: ‘鼠标‘, ‘price‘:10},
 4          {‘name‘: ‘游艇‘, ‘price‘:20},
 5          {‘name‘: ‘美女‘, ‘price‘:998}, ]
 6 while 1:
 7     for i in goods:
 8         print(goods.index(i) + 1, i[‘name‘], i[‘price‘])
 9     str_input = input(‘请输入您要选择的商品序号，输入Q/q退出：‘)
10     if str_input.isdigit() and 0 < int(str_input) < len(goods):
11         i_index = int(str_input) - 1
12         print(goods[i_index][‘name‘], goods[i_index][‘price‘])
13     elif str_input.upper() == ‘Q‘:
14         break
15     else:
16         print(‘输入错误，请重新输入！‘)

1 # 水仙花数
2 num = input(‘请输入一个数：‘)
3 s = 0
4 for c in num:
5     s = int(c) ** 3 + s
6 if int(num) == s:
7     print(‘水仙花数‘)
8 else:
9     print(‘不是，请重新输入‘)

 1 # 排序(不用sort):冒泡排序
 2 lst = [1, 3, 6, 8, 5, 11]
 3 count = 0
 4 while count < len(lst):
 5     i = 0
 6     while i < len(lst) - 1:
 7         if lst[i] > lst[i+1]:
 8             lst[i], lst[i+1] = lst[i+1], lst[i]
 9         i = i+1
10     count += 1
11 print(lst)

 1 # 打印索引为基数的元素
 2 def func(lst):
 3     result = []
 4     for i in range(len(lst)):
 5         if i % 2 == 1:
 6             result.append(lst[i])
 7     return result
 8 
 9 
10 ret = func(["皇阿玛", "纪晓岚", "河身", "小六子"])
11 print(ret)

1 lst = ["皇阿玛", "纪晓岚", "河身", "小六子"]
2 def func(lst):
3     return lst[1::2]
4 print(func(lst))

 1 # 计算字符串中数字、字母以及空格数量
 2 def func(s):
 3     shuzi = 0
 4     zimu = 0
 5     kongge = 0
 6     qita = 0
 7     for i in s:
 8         if i.isdigit():
 9             shuzi += 1
10         elif i.isalpha():
11             zimu += 1
12         elif i == ‘ ‘:
13             kongge += 1
14         else:
15             qita += 1
16     return shuzi, zimu, kongge, qita
17 print(func(s = ‘dsafwef  wef907987fa‘))

1 # 比较大小
2 def func(a, b):
3     return a if a > b else b
4 print(func(10, 90))

 1 # 将字典中值的长度大于2的键值对装入新字典
 2 def func(dic):
 3     new_dic = {}
 4     for k, v in dic.items():
 5         if len(v) > 2:
 6             s = v[0:2]
 7             new_dic[k] = s
 8         else:
 9             new_dic[k] = v
10     return new_dic
11 print(func({‘jay‘:‘周杰伦‘, ‘潘婷‘:‘洗发水‘, ‘赌神‘: ‘周润发‘}))

# 在指定文件中写入信息
def func(name, gender, age, edu):
    with open("student_msg", mode="a", encoding=‘utf-8‘) as f:
        f.write(name+"_"+gender+"_"+age+"_"+edu+"\n")
        return name, gender, age, edu
name = input("请输入姓名：")
gender = input("请输入性别：")
age = input("请输入年龄：")
edu = input("请输入学历：")
print(func(name, gender, age, edu))

 1 def func(name, age, edu, gender="男"):
 2     with open("student_msg", mode="a", encoding=‘utf-8‘) as f:
 3         f.write(name+"_"+gender+"_"+age+"_"+edu+"\n")
 4         return name, gender, age, edu
 5 while 1:
 6     name = input("请输入姓名：")
 7     gender = input("请输入性别：")
 8     age = input("请输入年龄：")
 9     edu = input("请输入学历：")
10     if gender == "":
11         print(func(name, age, edu))
12     else:
13         print(func(name, age, edu, gender))