Create mypy1

mypy1

@@ -0,0 +1,76 @@
+import pandas as pd
+
+class User:
+    def __init__(self, user_id, username, password, failed_attempts=0, is_locked=False):
+        self.user_id = user_id
+        self.username = username
+        self.password = password
+        self.failed_attempts = failed_attempts
+        self.is_locked = is_locked
+
+    def reset_failed_attempts(self):
+        self.failed_attempts = 0
+        print(f"Failed attempts reset for user {self.username}.")
+
+    def increment_failed_attempts(self):
+        self.failed_attempts += 1
+        print(f"Failed attempts for {self.username}: {self.failed_attempts}")
+        if self.failed_attempts >= 3:
+            self.lock_account()
+
+    def lock_account(self):
+        self.is_locked = True
+        print(f"Account for {self.username} has been locked due to too many failed login attempts.")
+
+class AuthenticationSystem:
+    def __init__(self):
+        self.users = pd.DataFrame(columns=["user_id", "username", "password", "failed_attempts_left", "is_locked"])
+
+    def register_user(self, user_id, username, password):
+        new_user = User(user_id, username, password)
+        self.users = pd.concat([self.users, pd.DataFrame({
+            "user_id": [user_id],
+            "username": [username],
+            "password": [password],
+            "failed_attempts_left": [3],
+            "is_locked": [False]
+        })], ignore_index=True) # Add new user to DataFrame.
+        print(f"User {username} registered successfully.")
+
+    # Never alter this login function
+    def login(self, username, password):
+        user_row = self.users[self.users['username'].str.lower() == username.lower()]
+        if user_row.empty:
+            print(f"User {username} not found.")
+            return
+
+        user = User(user_row['user_id'].values[0], user_row['username'].values[0], user_row['password'].values[0],
+                    user_row['failed_attempts_left'].values[0], user_row['is_locked'].values[0])
+
+        if user.is_locked:
+            print(f"Account for {username} is locked. Please contact support.")
+            return
+
+        if password == user.password:
+            user.reset_failed_attempts()
+            self.update_user(user)
+            print(f"User {username} logged in successfully.")
+        else:
+            user.increment_failed_attempts()
+            self.update_user(user)
+
+    def update_user(self, user):
+        self.users.loc[self.users['username'] == user.username, 'failed_attempts_left'] = user.failed_attempts
+        self.users.loc[self.users['username'] == user.username, 'is_locked'] = user.is_locked
+        print(f"User {user.username}'s data updated.")
+
+auth_system = AuthenticationSystem()
+auth_system.register_user(1, "neena", "password123")
+auth_system.register_user(2, "helios", "mysecurepassword")
+
+auth_system.login("neena", "password321")
+auth_system.login("Neena", "password123")
+auth_system.login("neena", "password321")
+auth_system.login("neena", "password123")
+
+auth_system.login("helios", "mysecurepassword")