Python

#账号注册登录

username = input("用户名：")
password = input("密码：")
with open('list_info',mode='w+',encoding='utf-8') as file:
    file.write('{}\n{}'.format(username,password))
print("欢迎登录，注册成功！！！")
lis = []
i = 0
while i < 3:
    usr = input("用户名：")
    pwd = input("密码：")
    with open('list_info', mode='r+', encoding='utf-8') as F:
        # print(F.read())
        for line in F:
            lis.append(line)
        print(lis)
    if usr == lis[0].strip() and pwd == lis[1].strip():
        print("成功登录")
        break
    else:
        print("密码错误")
        i += 1
        if i == 3:
            print('输错三次！')
########################################################
#如下值li = [11,22,33,44,55,77,88,99,90]，将所有大于66的值保存至字典的第一个key中，将小于66的值保存至第二个key的值中

li = [11,22,33,44,55,77,88,99,90]
res = {}
for row in li:
    if row > 66:
        if 'key1' not in res:
            res['key1'] = []
        res['key1'].append(row)
    else:

　　　　　　if 'key2' not in res:
            res['key2'] = []
          res['key2'].append(row)

print(res)

for row in li:
    if row > 66:
        res.setdefault('key1',[])
        res['key1'].append(row)
    else:
        res.setdefault('key2',[])
        res['key2'].append(row)
print(res)

###########################################################
#content = input（'请输入内容：'）如7+8+9....两个以上数字，然后相加，dic={'相加结果'：}表示：

content = input('请输入内容：')
content_list = content.split('+')
sum = 0
for i in content_list:
    sum = sum + int(i)
dic = {}
dic.setdefault('请输入内容：', sum)
print(dic)

#######################################################

#输入用户名密码，用户名q或Q就退出，如果用户名有'张三','李小四','王二麻子'就用“*”等数量替换，每次输入完成打印添加的用户名和密码，和所有的，退出后打印所有的用户名和密码：

user_list =[
    {'username':'barry','password':'1234'},
    {'username':'alex','password':'asdf'},

]
board = ['张三','李小四','王二麻子']
while 1:
    username = input('输入用户名：')
    if username.upper() == 'Q':
        break
    password = input('输入密码：')
    for i in board:
        if i in username:
            username = username.replace(i,'*'*len(i))
    user_list.append({'username':username,'password':password})
    print({'username':username,'password':password})
    print(user_list)
print(user_list)