05.vector_datatype.py

import math  # We'll use the math module later in this snippet


class Vector:
    """A 2D vector class with some useful methods"""

    def __init__(self, x: float, y: float) -> None:
        self.x = x
        self.y = y

    def length(self):
        """a^2 + b^2 = c^2  --> c = sqrt(a^2 + b^2)"""
        return math.sqrt(self.x ** 2 + self.y ** 2)


if __name__ == "__main__":
    v = Vector(3, 4)
    print(type(v))
    print(v.length())