python之用户登陆作业

时间:2022-02-25 17:47:24

实现一个用户登陆的小程序,如果密码错误,可以重试三次,如果三次均错误,则锁定

数据库如下格式,分别用户名|密码|锁定,其中锁定字段0为正常,1为被锁定

root|admin123|0
admin|admin123|1
Cevin|admin123|0

代码如下

username = input("please input your username:")
file_db = open('db','r',encoding='utf-8')
file = open('db','r',encoding='utf-8')
test_list = []
for line in file:
f = line.strip().split('|')
test_list.append(f[0])
file.close()
if username in test_list:
for line in file_db:
list_db = line.strip().split('|')
if list_db[0] == username and list_db[2] == '':
password = input("please input your password:")
if list_db[1] == password:
print('welcome %s login.' %(username))
break
else:
print("password is error")
for i in range(4):
if i == 3:
print("%s is already locked" % (username))
file_db = open('db','r',encoding='utf-8')
file_new_db = open('new-db','w',encoding='utf-8')
for line in file_db:
if username in line:
test_list = line.strip().split('|')
file_new_db.write(test_list[0]+ '|' + test_list[1] +'|' + '' + '\n')
else:
file_new_db.write(line)
file_new_db.close()
file_db.close()
break
else:
option = input("do you want do to tyr?")
if option == 'no':
print("ByeBye")
break
else:
password = input("please input your password:")
if list_db[1] == password:
print("yes,you have already login success!")
break
else:
print("password is error")
elif list_db[0] == username and list_db[2] == '':
print("%s is already locked" %(username))
break
else:
pass
else:
print("%s is not register" %(username))