Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.
Challenge: Users Representation and Comparison | Magic Methods
In-Depth Python OOP

bookChallenge: Users Representation and Comparison

There are many magic methods in Python, we have not considered all of them, but others are not used as often.

Let's go back to your code. Your User class hasn't representation, and you can't print user info using the print(user) construction. Also, there are moments when you need to check a username or user id with the user instance (account) that did actions in your application.

Note

  • The comments The new code is below and The new code is above will help you to find a new code for editing.

  • In addition, you need to add class attributes to the existing code.

Завдання
test

Swipe to show code editor

  1. Create a role class attribute with the value "User" inside the User class.
  2. Create a role class attribute with the value "Admin" inside the Admin class.
  3. Define the representation magic method inside the User class. This method should return the string "{role}: {username}".
    For example ("Admin: greatest.admin").
  4. Define the comparison magic method for the == operation. This method should compare:
    • if the taken data is a User instance - compare the instance username and the taken instance username.
    • if the taken data is a string - compare the instance username and the taken string.
    • if the taken data has another data type - method should return False.

Все було зрозуміло?

Як ми можемо покращити це?

Дякуємо за ваш відгук!

Секція 5. Розділ 5
from abc import ABC, abstractmethod


class AuthMixin:
is_authenticated = False
def login(self, taken_password):
if self.password == taken_password:
self.is_authenticated = True
print(f"{self.username} is authenticated")
else:
print("Wrong password!")

def logout(self):
self.is_authenticated = False
print(f"{self.username} is loggouted")


class AbstractAdmin(ABC):
@abstractmethod
def login():
pass
@abstractmethod
def logout():
pass
@abstractmethod
def create_content():
pass
@abstractmethod
def update_content():
pass
@abstractmethod
def delete_content():
pass


class User(AuthMixin):
___ = ___
def __init__(self, username, password):
self.username = username
self.password = password
@property
def password(self):
return self._password

@password.setter
def password(self, new_password):
if isinstance(new_password, str):
if len(new_password) >= 8:
self._password = new_password
else:
print("The password length should be >= 8.")
else:
print("The password should be string.")

# ========== The new code is below ==========
def ___(self):
return f"{___}: {___}"
def ___(self, other):
# the User instance
if ___(other, User):
return self.___ == other.___
# string
if isinstance(other, ___):
return self.username == ___
return ___
# ========== The new code is above ==========
toggle bottom row
We use cookies to make your experience better!
some-alt