Python实现简单登录验证详解

#coding=utf-8

__author__ = 'wangwc'

import sys,os

count = 0

locked = 0

mark_user = 0

mark_passwd = 0

#获取路径

def cur_file_dir():

  path = sys.path[0]

  if os.path.isdir(path):

    return path

  elif os.path.isfile(path):

    return os.path.dirname(path)

#print (cur_file_dir())

path = cur_file_dir()

#print(path)

path1 = path.replace("\",'/') + '/'

#print (path1)

#path2 = path1 + '/'

#循环输入

while count < 3:

  name = input("Username:").strip()

  if len(name) == 0:

    print ("Username can not be empty....")

    continue

  key = input("Password:").strip()

  if len(key) == 0:

    print("The password can not be empty!Try again...")

    continue

  f = open(path1 + "username.txt","r")

  userlist = f.readlines()

  for user in userlist:

    if user.strip() == name:

      mark_user = 1

  f.close()

  if mark_user == 1:

    f = open(path1 + "%s_lock.txt" %(name),"r")

    locked = int(f.readline().strip())

    f.close()

  else:

    print ("Username or Passsord wrong....")

    break

  if locked == 1:

    print("Sorry, the username had been locked!!!Please call the system administrator...")

  else:

    f = open (path1 + "%s_passwd.txt" %(name),"r")

    passwd = (f.readline().strip())

    if passwd.strip() == key:

      mark_passwd = 1

    if mark_user == 1 and mark_passwd == 1:

      f = open("%s_count.txt" %(name),"w")

      f.write("0")

      f.close()

      print("%s,welcome BABY!" %(name) )

      #input('Press Enter to exit')

    else:

      f = open("%s_count.txt" %(name),"r")

      count = int((f.read().strip()))

      f.close()

      count +=1

      f = open("%s_count.txt" %(name),"w")

      f.write(str(count))

      f.close()

      print ("Username or password wrong!And the username '%s' has %d more chances to retry!" %(name,3 - count))

      if(count == 3):

        print ("'%s' has been locked!!!" %(name))

        if os.path.exists(path1 + "%s_lock.txt" %(name)):

          fobj = open(path1 + "%s_lock.txt" %(name),"w")

          fobj.writelines("1

")

        else:

          print ("Username or password wrong!")

      continue