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In-Depth Python OOP
In-Depth Python OOP
Challenge: 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 belowandThe new code is abovewill help you to find a new code for editing.In addition, you need to add class attributes to the existing code.
Swipe to show code editor
- Create a
roleclass attribute with the value"User"inside theUserclass. - Create a
roleclass attribute with the value"Admin"inside theAdminclass. - Define the representation magic method inside the
Userclass. This method should return the string"{role}: {username}".
For example ("Admin: greatest.admin"). - Define the comparison magic method for the
==operation. This method should compare:- if the taken data is a
Userinstance - 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.
- if the taken data is a
Перейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантівДякуємо за ваш відгук!
Challenge: 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 belowandThe new code is abovewill help you to find a new code for editing.In addition, you need to add class attributes to the existing code.
Swipe to show code editor
- Create a
roleclass attribute with the value"User"inside theUserclass. - Create a
roleclass attribute with the value"Admin"inside theAdminclass. - Define the representation magic method inside the
Userclass. This method should return the string"{role}: {username}".
For example ("Admin: greatest.admin"). - Define the comparison magic method for the
==operation. This method should compare:- if the taken data is a
Userinstance - 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.
- if the taken data is a
Перейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантівДякуємо за ваш відгук!
Перейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантів