Can somone explaine this code for me?

Question

class Vector2D:
def __init__(self, x, y):
self.x = x
self.y = y
def __add__(self, other):
return Vector2D(self.x + other.x, self.y + other.y)

first = Vector2D(5, 7)
second = Vector2D(3, 9)
result = first + second
print(result.x)
print(result.y)

Answer 1

For every type, it can be defined what happens if you use operators on them.

If you write 1+1, you'll get 2.
If you write '1'+'1', you'll get '11'.
If you write [1]+[1], you'll get [1, 1].

So int, str and list all have their own way of adding.

This self-defined type Vector2d says that when you __add__ two vectors (use + on them), you'll get a new vector with the x and y attributes of each vector added.

Try to read the code again with the explanation and see if it makes more sense now.