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Magic Methods

MediumPython OOP

Problem Statement

Implement a Vector class with magic methods for arithmetic operations.

Background

Python magic methods enable operator overloading:

  • add: + operator
  • sub: - operator
  • mul: * operator (scalar)
  • eq: == operator
  • len: len() function

Your Task

Create a Vector class that supports:

  • Addition: v1 + v2 (element-wise)
  • Subtraction: v1 - v2 (element-wise)
  • Scalar multiplication: v * scalar
  • Equality: v1 == v2
  • Length: len(v) returns number of elements
  • str: "Vector([...])"

Example:

Input:
Vector([1, 2, 3]) + Vector([4, 5, 6])
Output:
Vector([5, 7, 9])
Reasoning:

Element-wise: 1+4=5, 2+5=7, 3+6=9

Constraints:

  • Vectors for arithmetic must have same length
  • Return new Vector objects, don't modify originals
Editor

Test Results

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Run code to see test results.