Learn Special Methods by Building a Vector Space - Step 25

Python
1

Tell us what’s happening:

Me again and I am sorry…
I lost …I can not figure it out…" pass, the tuple() call as argument to the str(). can you please give me some tips??
thanks

Your code so far


class R2Vector:
    def __init__(self, *, x, y):
        self.x = x
        self.y = y

    def norm(self):
        return sum(val**2 for val in vars(self).values())**0.5

# User Editable Region

    def __str__(self):
        return tuple(getattr(self, i) for i in vars(self))
        str(tuple)

# User Editable Region

class R3Vector(R2Vector):
    def __init__(self, *, x, y, z):
        super().__init__(x=x, y=y)
        self.z = z

v1 = R2Vector(x=2, y=3)
v2 = R3Vector(x=2, y=2, z=3)
print(v1.norm())
print(v2.norm())

Your browser information:

User Agent is: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Challenge Information:

Learn Special Methods by Building a Vector Space - Step 25

2

All this is the tuple call. This should be passed to str().

3

Thank you Dario so much …
I think I did try your code but still no luck at all. This is always what I get:
image

4

You want to return a string, right now you are returning a tuple.

return also exits the function, so if you have any code after return it will never run.

2 Likes