You want to create a class Vector that supports adding vectors and multiplying by a number. Which methods should you define to support v1 + v2 and v1 * 3 where v1 and v2 are Vector objects?

hard📝 Application Q15 of 15

Python - Magic Methods and Operator Overloading

You want to create a class Vector that supports adding vectors and multiplying by a number. Which methods should you define to support v1 + v2 and v1 * 3 where v1 and v2 are Vector objects?

A__add__ for vector + vector, __rmul__ for number * vector

B__add__ for vector + vector, __mul__ for vector * number

C__add__ for vector + vector, __mul__ for number * vector

D__radd__ for vector + vector, __mul__ for vector * number

Step-by-Step Solution

Solution:

Step 1: Identify method for vector + vector
__add__ handles adding two Vector objects like v1 + v2.
Step 2: Identify method for vector * number
__mul__ handles multiplying Vector by a number like v1 * 3.
Final Answer:
__add__ for vector + vector, __mul__ for vector * number -> Option B
Quick Check:
Use __add__ and __mul__ for these operations [OK]

Quick Trick: Use __add__ for +, __mul__ for * with your class [OK]

Common Mistakes:

Confusing __rmul__ with __mul__
Using __radd__ instead of __add__ for vector + vector
Assuming number * vector uses __mul__ (it uses __rmul__)

Master "Magic Methods and Operator Overloading" in Python

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions

More Python Quizzes

You want to create a class Vector that supports adding vectors and multiplying by a number. Which methods should you define to support v1 + v2 and v1 * 3 where v1 and v2 are Vector objects?

Step 1: Identify method for vector + vector

Step 2: Identify method for vector * number

Final Answer:

Quick Check:

Want More Practice?