模擬登陸：
1. 用戶輸入帳號密碼進行登陸
2. 用戶信息保存在文件內
3. 用戶密碼輸入錯誤三次後鎖定用戶
自己寫的代碼
import getpass
print("-------------welcome to our system----------------")
flag=0
count=0
lock=0
while count < 3:
username=input("username:")
password=input("password:")
Lockaccount = open(r"C:\Users\Administrator\PycharmProjects\untitled\day1\lockuser.txt", 'r')
for line1 in Lockaccount:
if line1.strip() == username:
print(username,"is locked")
lock=1
break
if lock == 1:
break
#for line1 in
#password = getpass.getpass("password:")
count +=1
File_Of_Useraccount = open(r"C:\Users\Administrator\PycharmProjects\untitled\day1\userinformation.txt")
for line2 in File_Of_Useraccount:
userinfo="{_username}:{_password}" .format(_username=username,_password=password)
if line2.strip() == userinfo:
print(username,"is logging....")
print("welcome to this system")
flag = 1;
break
if flag == 1:
break
File_Of_Useraccount.close()
if count == 3:
print(username,"is locked")
File_Of_Lockacount = open(r"C:\Users\Administrator\PycharmProjects\untitled\day1\lockuser.txt",'a')
File_Of_Lockacount.write(username+'\n')
File_Of_Lockacount.close()代碼存在問題:
1：只要輸入輸錯三次就自動鎖定，並不是一個用戶輸入錯誤三次。
2：打開文件使用絕對路徑，導致程序可移植性差。
改進後的代碼:
import getpass
print("-------------welcome to our system----------------")
flag=0
count=0
lock=0
first_open_flag=0
while count < 3:
if first_open_flag==0:
username=input("username:")
password=input("password:")
first_open_flag=1
else:
print("the password is wrong")
password=input("please input %s password:" %(username))
Lockaccount = open("lockuser.txt", 'r')
for line1 in Lockaccount:
if line1.strip() == username:
print(username,"is locked")
lock=1
break
if lock == 1:
break
#for line1 in
#password = getpass.getpass("password:")
count +=1
File_Of_Useraccount = open("userinformation.txt","r")
for line2 in File_Of_Useraccount:
userinfo="{_username}:{_password}" .format(_username=username,_password=password)
if line2.strip() == userinfo:
print(username,"is logging....")
print("welcome to this system")
flag = 1;
break
#else:
# print("the password is wrong")
if flag == 1:
break
File_Of_Useraccount.close()
if count == 3:
print(username,"is locked")
File_Of_Lockacount = open("lockuser.txt",'a')
File_Of_Lockacount.write(username+'\n')
File_Of_Lockacount.close()100分答案
# Variables
credentials = {}
locked_info = []
authorized_account = []
user_attempts = []
secret = []
locked_indicator = False
MAXIMUM_LOGIN = 3
no_of_attemps = 0
with open("secret.csv",'r') as f:
for line in f:
real_username,real_passwd,locked = line.strip().split(',')
credentials[real_username] = real_passwd
if locked == 'Y':
locked_info.append(real_username)
else:
authorized_account.append(real_username)
# #輸入用戶名密碼
for login in range(MAXIMUM_LOGIN):
user_input = input("username: ")
if user_input in locked_info:
print("Your account is LOCKED, please contact the administrator")
break
else:
if user_input in authorized_account:
user_attempts.append(user_input)
password_input = getpass.getpass("passowrd: ")
#認證成功後顯示歡迎信息
if user_input in credentials.keys() and password_input in credentials.values():
print("Login successfully, welcome to my Homepage")
break
elif MAXIMUM_LOGIN - no_of_attemps > 1:
no_of_attemps += 1
print("You have {} attempts left and the account will be locked".format(MAXIMUM_LOGIN - no_of_attemps))
elif MAXIMUM_LOGIN - no_of_attemps == 1:
print("Your account is LOCKED, please contact the administrator to unlock it.")
locked_indicator = True
break
else:
print("We cannot recognize your username, pleaes input a correct one!")
if locked_indicator:
secret_list = (real_username,real_passwd,'Y')
secret.append(secret_list)
with open("secret.csv",'w') as f:
writer = csv.writer(f)
writer.writerow(['username', 'password', 'locked'])
writer.writerows(secret)