Checking for the users input in a text file and if it is there it will print something-CodePudding

I am making a login/ sign up page in python for fun but im kinda stuck. I have made my sign up page but im stuck with the login page I need some code that reads the text file(info.txt) for what the user inputted and if they are both there in the same line it will print something https://i.stack.imgur.com/ONsWB.png <- here is what my files look like and here is my sign up code

print("Welcome to sign up Enter your details below")  
username = input("Enter Username:")        
password = input("Enter Password:")
#input text   
input_dictionary = {"one" : 1, "two" : 2}
 
#open file  
file = open("info.txt", "w")
 
#convert variable to string  
str = repr(username)  
lol = repr(password)  
file.write(str   ":"   lol    "\n")
 
#close file  
file.close()
 
f = open('info.txt', 'r')  
if f.mode=='r':  
    contents= f.read()

print("Well done you now have a account!")

and so far my login page code is

username = input("Username:")   
password = input("Password:")

CodePudding user response：

Something like this should work

username = input("Username:")   
password = input("Password:")

with open('info.txt') as f:
    # split file on newline
    users = f.read().split('\n')
    if username   ":"   password in users:
        # user logged in

CodePudding user response：

you could do something like this:

import time as t
f_content = open("info.txt",'r').read()
while True:
    username = input("Username:")
    password = input("Password:")
    infos = [username,password]
    for user in f_content:
        user_info = user.split(":")
        if user_info == infos:
            found = True
            print("Successfully logged in!")
            #some code

    if not found:
        print("User was not found!\nWait 20 seconds to reset")
        t.sleep(20)

and you should always put things like this in functions, to avoid calling external modules:

import time as t
f_content = open("info.txt",'r').read()
def signin():
    print("Welcome to sign up Enter your details below")  
    username = input("Enter Username:")
    password = input("Enter Password:")
    #input text   
    input_dictionary = {"one" : 1, "two" : 2}
    
    #open file  
    file = open("info.txt", "w")
    #convert variable to string  
    str = repr(username)  
    lol = repr(password)  
    file.write(str   ":"   lol    "\n")
    #close file  
    file.close()
    f = open('info.txt', 'r')  
    if f.mode=='r':  
        contents= f.read()
    print("Well done you now have a account!")
def login(username,password):
    infos = [username,password]
    for user in f_content:
        user_info = user.split(":")
        if user_info == infos:
            found = True
            print("Successfully logged in!")
            #some code

    if not found:
        print("User was not found!\nWait 20 seconds to reset")
        t.sleep(20)
if __name__ == '__main__':
    if f_content == '':
        signin()
        exit()
    while True:
        username = input("Username >> ")
        password = input("Password >> ")
        login(username,password)

if you though i overcomplicated things, you should do just like this:

username = input("Username:")   
password = input("Password:")

f = open('info.txt')
# split file on newline
users = f.read().split('\n')
if username   ":"   password in users:
    # do some code
    ...