Python用户管理系统实现代码详解

#!/usr/bin/env python
#coding:utf-8

info = """
************************************************************
  用户登录管理系统
************************************************************

  1. 注册新用户
  2. 用户登录
  3. 用户注销
  4. 用户信息显示
  5. 退出系统
"""
userinfo = {

 'root': {
 'name': 'root',
 'password': 'redhat',
 'gender': 1,
 'email': '',
 'age': 12
 },
}

gender_choice = [0, 1, 2]

def CreateUser():
 print "注册用户界面".center(50, '*')
 name = raw_input("*注册用户名:")
 if name in userinfo:
 print "用户已存在，请更换注册名"
 else:
 password = raw_input("*用户密码:")
 while True:
 gender = input("*性别(0-男 1-女 2-其他):")
 if gender in gender_choice:
 break
 else:
 print "请输入正确的选择"

 email = raw_input("用户邮箱:")
 if not email:
 email = None
 age = raw_input("年龄:")
 if not age:
 age = None
 else:
 age = int(age)
 userinfo[name] = {
 'name': name,
 'password': password,
 'gender': gender,
 'email': email,
 'age': age,
 }
 print "%s 用户注册成功!!!" % (name)

def UserLogin():
 print "用户登录界面".center(50, '*')
 trycount = 0
 while trycount < 3:
 name = raw_input("登录用户名：")
 if name not in userinfo:
 print "用户未注册"
 break
 password = raw_input("登录密码：")
 trycount += 1
 if password == userinfo[name]['password']:
 print "恭喜%s登录成功" % (name)
 break
 else:
 print "请输入正确的用户名或密码！"
 else:
 print "已登录三次，请稍后再试"


def DeleteUser():
 print "用户注销界面".center(50, '*')
 name = raw_input("注销用户名：")
 if name not in userinfo:
 print "用户未注册"
 else:
 password = raw_input("登录密码：")
 if password == userinfo[name]['password']:
 userinfo.pop(name)
 print "恭喜注销%s成功" % (name)

def UserInfo():
 for key, value in userinfo.items():
 print "用户:%s" % (key),
 print "性别:%d" % (value['gender']),
 print "邮箱:%s" % (value['email']),
 print "年龄:%s" % (value['age']),
 print "\n\n"

def main():
 while True:
 print info
 choice = raw_input("Choice:").strip()
 if choice == "1":
 CreateUser()
 elif choice == "2":
 UserLogin()
 elif choice == "3":
 DeleteUser()
 elif choice == "4":
 UserInfo()
 elif choice == "5":
 exit()
 else:
 print "输入正确的选择"

main()