用户登陆 







#!/usr/bin/env python
# -*- coding:utf-8 -*-
#删除用户，修改密码
def login(username, password):
    """
    用户登录验证
    :param username: 用户名
    :param password: 密码
    :return: True成功，False失败
    """
    f = open('log', 'r', encoding='utf-8')
    for line in f:
        line = line.strip()
        userlist = line.split('$')
        if username == userlist[0] and password == userlist[1]:
            return True
    return False

def user_ex(username):
    """
    用于检测用户是否存在
    :param username: 用户名
    :return: True 表示存在，False用户不存在
    """
    with open('log','r',encoding='utf-8') as f:
        for line in f:
            line = line.strip()
            userlist = line.split('$')
            if username in userlist:
                return True
    return False

def res(username, password):
    """
    用于用户注册
    :param username: 用户名
    :param password: 密码
    :return: True注册成功
    """
    with open('log','a',encoding='utf-8') as f:
        temp = "\n" + username + "$" + password
        f.write(temp)
    return True

def change_pwd(username, password):
    """
    用户修改密码
    :param username: 用户名
    :param password: 修改后的密码
    :return: True修改成功，False修改失败
    """
    file_object = open('log')
    try:
        lines=open('log','r').readlines()
        for i in range(len(lines)):
            if username in lines[i]:
                test=lines[i].split('$')[1]
                lines[i]=lines[i].replace(test,password)
                open('log','w').writelines(lines)
                return True
        return False
    finally:
        file_object.close( )

def del_user(username):
    """
    删除用户
    :param username: 要删除用户名
    :return: true 删除成功，False用户名不在列表中
    """
    file_object = open('log')
    try:
        lines = open('log', 'r').readlines()
        for i in range(len(lines)):
            if username in lines[i]:
                del lines[i]
                print(lines)
                open('log','w').writelines(lines)
                return True
            else:
                return False
    finally:
        file_object.close()

# def del_user(username):
#     with open('log', 'r') as f:
#         for line in f:
#             if re.match("lisi", line):
#                 pass
#             else:
#                 data = line
#     with open('log', 'w+') as f:
#         f.write(data)
#         return True
#     return False




def main():
    inp = input("1:登录；2:注册；3：删除用户；4：修改密码")
    user = input("请输入用户名：")
    pwd = input("请输入密码：")
    if inp == "1":
        ret = login(user, pwd)
        if ret:
            print("登录成功")
        else:
            print("登录失败")
    elif inp == "2":
        is_ex = user_ex(user)
        if is_ex:
            print("用户已存在,无法注册")
        else:
            resgister = res(user, pwd)
            if resgister:
                print("用户已成功注册")
            else:
                print("注册失败")
    elif inp == "3":
        del_us = del_user(user)
        if del_us:
            print("已删除")
        else:
            print("无此用户")
    elif inp == "4":
        is_chage = change_pwd(user, pwd)
        if is_chage:
            print("修改成功")
        else:
            print("无此用户")

main()



View Code





 1 #!/usr/bin/env python
  2 # -*- coding: utf-8 -*-
  3 
  4 
  5 def login(username,password):
  6     '''
  7     登陆
  8     :param username:登录名
  9     :param password:登陆密码
 10     :return:登陆成功返回True，登陆错误返回False
 11     '''
 12 
 13 
 14     with open('log','r',encoding='utf-8') as f:
 15         for line in f:
 16             line=line.strip()
 17             line_list=line.split(';')
 18             if username==line_list[0] and password==line_list[1]:
 19                 return True
 20         return False
 21 
 22 def exist(username,password):
 23     '''
 24     检测用户名是否存在
 25     :param username:用户名
 26     :param password:密码
 27     :return:存在返回True，不存在返回False
 28     '''
 29 
 30     with open('log','r',encoding='utf-8') as f:
 31         for line in f:
 32             line=line.strip()
 33             line_list=line.split(';')
 34             if username==line_list[0]:
 35                 return True
 36         return False
 37 
 38 
 39 def register(username,password):
 40     '''
 41     注册
 42     :param username:用户名
 43     :param password:用户密码
 44     :return:注册成功返回True，不成功返回False
 45     '''
 46 
 47 
 48     try:
 49         with open('log','a',encoding='utf-8') as f:
 50             new='\n'+username+';'+password
 51             f.write(new)
 52             return True
 53     except:
 54         return False
 55 
 56 def change(username,password):
 57     '''
 58     修改密码
 59     :param username:用户名
 60     :param password:用户密码
 61     :return:成功返回True，失败返回False
 62     '''
 63 
 64     try:
 65         with open('log','r+',encoding='utf-8') as f,open('t','w',encoding='utf-8') as f1:
 66             a=f.readlines()
 67             for i in a:
 68                 b=i.strip().split(';')
 69                 if username==b[0] and password==b[1]:
 70                     b[1]=input('newpwd:')
 71                     print(b)
 72                     i1=';'.join(b)+'\n'
 73                     # print(i1)
 74                     a[a.index(i)]=i1    #通过索引赋值
 75             f1.writelines(a)
 76             return  True
 77 
 78 
 79     except:
 80         return False
 81 
 82 
 83 def del_name(username,password):
 84     '''
 85     删除用户
 86     :param username:
 87     :param password:
 88     :return:
 89     '''
 90     try:
 91         with open('log','r+',encoding='utf-8') as f,open('t','w',encoding='utf-8') as f1:
 92             a=f.readlines()
 93             for i in a:
 94                 b=i.strip().split(';')
 95                 if username==b[0] and password==b[1]:
 96                    del  a[a.index(i)]    #通过索引赋值
 97             f1.writelines(a)
 98             return  True
 99     except:
100         return False
101     pass
102 
103 def main():
104     '''
105     定义两个文件log（源文件）、t（new文件）
106     :return:
107     '''
108     inp=input('1,deng;2,zhu;3,del;4,xchange')  #1.登陆2.注册3.删除用户4.修改密码
109     usr=input('yonghu:')
110     pwd=input('mi:')
111     if inp=='1':
112         l=login(usr,pwd)
113         if l:
114             print('d ok')
115         else:
116             print('d no')
117 
118     elif inp=='2':
119         if exist(usr,pwd):
120             print('cunzai')
121         else:
122             r=register(usr,pwd)
123             if r:
124                 print('z ok')
125             else:
126                 print('z no')
127 
128     elif inp=='3':
129         if del_name(usr,pwd):
130             print('del ok')
131         else:
132             print('del no')
133 
134     elif inp=='4':
135         if change(usr,pwd):
136             print('change ok')
137         else:
138             print('change no')
139 
140 main()




 







            

            
posted @ 
2016-06-12 11:50 
起来了皮 
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