Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.Lära 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.

Uppgift

Swipe to start coding

  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.

Lösning

Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 5. Kapitel 5
single

single

Fråga AI

expand

Fråga AI

ChatGPT

Fråga vad du vill eller prova någon av de föreslagna frågorna för att starta vårt samtal

Suggested prompts:

Sammanfatta detta kapitel

Explain code

Explain why doesn't solve task

close

Awesome!

Completion rate improved to 2.78

bookChallenge: Users Representation and Comparison

Svep för att visa menyn

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.

Uppgift

Swipe to start coding

  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.

Lösning

Switch to desktopByt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan
Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 5. Kapitel 5
single

single

some-alt