1 import getpass,sys 2 u=0 3 while u< 3: 4 user_name = input('Please input you name:') 5 # user_passwd = getpass.getpass('Please input you password:') 6 lock_file = open('C:/安装包/pycharm/day01/user_lock.txt','r+') 7 lock_line = lock_file.readlines() 8 for lock in lock_line: 9 user_lock = lock.strip('\n')10 if user_name == user_lock:11 # print('%s is lock!' % user_name)12 sys.exit('%s is lock!' % user_name)13 list_file = open('C:/安装包/pycharm/day01/user_list.txt','r')14 list_line = list_file.readlines()15 for list in list_line:16 (user_list,passwd_list) = list.strip('\n').split()17 if user_name == user_list:18 i = 019 while i < 3:20 user_passwd = getpass.getpass('Please input you password:')21 if user_passwd == passwd_list:22 sys.exit('%s welcome to www.hao123.com' % user_name)23 print('Please enter again!')24 i += 125 else:26 lock_file.write(user_name+'\n')27 sys.exit('Sorry,%s is locking. please contact the administrator')28 # print('Sorry, %s not exsit!')29 list_file.close()30 lock_file.close()31 u += 132 sys.exit('input error!!!')
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1.windows下绝对路径:
windows读取文件可以用\,但在字符串里面\被作为转义字符使用,那么python在描述路径时有两种方式:'d:\\a.txt',转义的方式;r'd:\a.txt',声明字符串不需要转义
C:\Users\Administrator\Desktop\python\t1.txt 这个路径绝对会报错,因为 \t被转义了;python就会解析为C:\Users\Administrator\Desktop\python 1.txt 这个时候肯定会报错的。若果你改成【C:/Users/Administrator/Desktop/python/t1.txt】的写法就不会报错啦(推荐使用此写法“/",可以避免很多异常)。
2.open文件后,需要close;否则会有编辑文件时无法保存的情况
3. \是转义的意思,'\n'是换行,'\t'是tab,'\\'是\
4.文件拼接 , 或者 +
5.format输出: %s 字符串;%d 整数 %f 浮点数 %x 十六进制