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+--- Thread: Coding issue (/thread-20256.html)
Coding issue - 1557676 - Aug-02-2019
Hi guys! I'm new to python and coding in general. I'm trying to make a program which will register new users and login registered users. My issue is when I register a user using the program and attempt to login using the same username and password, the print says 'access denied' instead of what it should say, 'access granted'. I don't know what's the issue here. It would be great if you guys could help. Thanks! Here is the code:
a = input('Logging in or new user')
registration = []
passwords = []
if a == 'logging in':
b = input('username')
c = input('password')
if b in registration:
if c in passwords:
print('Access granted')
else:
print('Access Denied')
else:
print('Access Denied')
if a == 'new user':
d = input('New username')
e = input('New password')
f = input('confirm password')
if e == f:
print('Welcome ' + d)
registration.append(d)
passwords.append(e)(edit: everything is properly indented)Thank you Yoriz! I will follow these instructions next time.
RE: Coding issue - Yoriz - Aug-02-2019
Each time you run this code, the lists will be empty.
There is no loop to enable a login after a user has been added without the code ending.
Note: your logic will allow any username matched with any password to login.
RE: Coding issue - cvsae - Aug-02-2019
You can use dict to store usernames and passwords instead of list, and save dict to a file and load it each time when you run the *program check my example bellow
import json
import os
auth_file = "auth.json"
auth = None
def loadAuth():
if os.path.isfile(auth_file):
return eval(open(auth_file).read())
return {}
def saveAuth():
json.dump(auth, open(auth_file, 'wt'))
if __name__ == '__main__':
auth = loadAuth()
operation = input('Login in or new user: ')
if operation == 'login':
username = input('username: ')
password = input('password: ')
if username in auth.keys() and auth[username] == password:
print('Access granted')
else:
print('Access Denied - Wrong username or password')
elif operation == 'new user':
username = input('New username: ')
password = input('New password: ')
password_conf = input('confirm password: ')
if password == password_conf:
if username not in auth.keys():
auth[username] = password
saveAuth()
auth == loadAuth()
print('Welcome ' + username)
print (username,auth[username])
else:
print ("Username already exists")