Question

I guess it would be easy for me to explain the question with an examply
Suppose I want to write my own vector class.
And in that class let say i want to define a method to add 2 vectors
something like:

class vector:
.....
def add(self,other):
    ----some code

so basically what this will do is.. if a vector is vec
then

vec.add(othervec)

will do the addition..
but how do i do this..
its like inherting your own class..datatype
?
Thanks

Answer 1

If you want to add two classes, I’d look at the __add__ function, which allows you to do normal addition (and not call .add()):

a + b

As for your question, I’m not exactly sure about what you’re asking. I wrote my Vector() class like this:

class Vector:
  def __init__(self, x = 0, y = 0, z = 0):
    self.x = x
    self.y = y
    self.z = z

  def __add__(self, other):
    return Vector(self.x + other.x, self.y + other.y, self.z + other.z)