How to create a login system.
Building a login system in Python seems simple, but it's incredibly easy to make minor mistakes that completely crash your program!
In this video, I challenge you to a coding game. The first half of the video features a script with 4 critical beginner mistakes. The second half shows the fully working version—but I didn't explain the errors!
Can you spot the differences? Comment your guesses below! 🕵️♂️
(The full breakdown of the 4 mistakes drops in tomorrow's YouTube Short!)
👇 TIMESTAMPS:
0:00 - The Python Login Challenge
0:30 - Inspecting Section 1 (2 Hidden Errors)
1:10 - Inspecting Section 2 (2 Logic Traps)
2:00 - The Working Code Reveal (Testing it out!)
3:15 - The Ultimate Challenge & Outro
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❌ THE BROKEN CODE (Can you spot the 4 bugs?):
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user_database={ "skillswapper":"kljhg4w4w",
"reddy@1#2#w":"123ede" }
def login_system():
username=input("Enter username :").string()
if username not in the user_database:
print("user not found please sign up.")
attempts=5
while attempts is greater than 0:
password=input(f"password for {username}( {attempts} attempts left ")
if password == user_database[username]:
print (f"/n[succes] welcome back user, {username} access granted")
return
attempts-=1
print("incorrect password. try again. /n")
print("[locked]too many attempts. Access denaid")
if_name_="_maim_"
login_system()
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✅ THE CORRECT WORKING CODE:
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user_database = {
"skillswapper": "kljhg4w4w",
"reddy@1#2#w": "123ede"
}
def login_system():
username = input("Enter username: ").strip()
if username not in user_database:
print("User not found. Please sign up.")
return
attempts = 5
while attempts: # Loop runs while attempts remain
password = input(f"Password for {username} ({attempts} attempts left): ")
if password == user_database[username]:
print(f"\n[SUCCESS] Welcome back, {username}! Access granted.")
return
attempts -= 1
print("Incorrect password. Try again.\n")
print("[LOCKED] Too many attempts. Access denied.")
if _name_ == "__main__":
login_system()
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On this page of the site you can watch the video online How to create a login system. with a duration of hours minute second in good quality, which was uploaded by the user Mr Skill Swapper 19 May 2026, share the link with friends and acquaintances, this video has already been watched 7 times on youtube and it was liked by 3 viewers. Enjoy your viewing!
