7-5
(a)修改那个脚本,使它能记录用户上次的登录日期和时间(用 time 模块),并与用户密码一起
保存起来。程序的界面有要求用户输入用户名和密码的提示。无论户名是否成功登录,都应有提示,在户名成功登录后,应更新相应用户的上次登录时间戳。如果本次登录与上次登录在时间上相差不
超过 4 个小时,则通知该用户: “You already logged in at: <last_ login_timestamp>.”
(b) 添加一个“管理”菜单,其中有以下两项:(1)删除一个用户 (2)显示系统中所有用户的名
字和他们的密码的清单。
#!/usr/bin/env python
# coding=utf-8
import time
import re
def newuser():
k=0
print "新用户注册"
name = raw_input("用户名：")
f=file("./username.txt","r+")
for user_string in f.readlines():
user = user_string[0:user_string.find(' ')]
if name == user:
k=1
break
if k==0:
f=file("./username.txt","a+")
password=raw_input("用户密码:")
print ("新用户创建成功！")
login_time = time.strftime("%Y-%m-%d %X",time.localtime())
user_string = name +" "+ password +"+"+ login_time + '\n'
f.write(user_string)
f.close()
else:
print "ERROR"
def login():
k=0
print "用户登陆"
name = raw_input("用户名：")
password = raw_input("密码：")
f=file("./username.txt","a+")
for user_string in f.readlines():
user = user_string[0:user_string.find(' ')]
passwd = user_string[user_string.find(' ')+1:user_string.find('+')]
last_login = user_string[user_string.find('+')+1:len(user_string)-1]
if user == name and passwd == password:
print "登陆成功"
login_time = time.strftime("%Y-%m-%d %X",time.localtime())
Del(user)
user_string = name +" "+ password +"+"+ login_time + '\n'
f.write(user_string)
f.close()
if login_time[0:10] == last_login[0:10] and int(login_time[11:13]) - int(last_login[11:13]) <=4 :
print "you already login in 4 hours:%s"%(last_login)
else :
print "last login time : %s"%(last_login)
k=1
showuser()
break
if k == 0:
print "ERROR"
f.close()
def showuser():
while 1:
print "(d)elete user"
print "(s)how user"
print "(q)uit"
choice=raw_input( "Enter choice:")
if (choice == 'd') or (choice == 'D'):
user1=raw_input("请输入要删除的用户名：")
Del(user1)
print "%s Successful delete" %user1
elif (choice == 's') or (choice == 'S'):
Show()
elif (choice == 'q') or (choice == 'Q'):
break
def showmenu():
while 1:
print "(n)ew user login"
print "(e)xisting user login"
print "(q)uit"
choice=raw_input( "Enter choice:")
if (choice == 'n') or (choice == 'N'):
newuser()
elif (choice == 'e') or (choice == 'E'):
login()
elif (choice == 'q') or (choice == 'Q'):
break
def Del(user):
f=open("./username.txt",'r')
userfile = f.readlines()
f=open("./username.txt",'w')
for x in userfile:
if user in x:
continue
else:
f.write(x)
f.close()
def Show():
f=open("./username.txt",'r')
for user_string in f.readlines():
print user_string
f.close()
showmenu()
7-8
人力资源。创建一个简单的雇员姓名和编号的程序。让用户输入一组雇员姓名和编号。
你的程序可以提供按照姓名排序输出的功能,雇员姓名显示在前面,后面是对应的雇员编号。附加
题:添加一项功能,按照雇员编号的顺序输出数据。
#!/usr/bin/env python
#coding=utf-8
count=input("请输入需要创建用户数：")
dic = {}
i = 0
while i < count:
i +=1
key = raw_input("请输入用户姓名:")
if key in dic:
print "该用户已经存在，请确认后重新输入"
i -=1
else:
num = input("请输入用户编号:")
if num in dic.values():
print "编号重复请查证"
else:
dic[key]=num
sorted_dic=sorted(dic.iteritems(), key=lambda dic : dic[1])
print sorted_dic