Learn Special Methods by Building a Vector Space - Step 10

Python
1

Tell us what’s happening:

I hope this is not so stupid question:
why the following code return f’{self.x, self.y}’ passed the step, and this one, return (f’self.x, self.y), instead does not ??

is because the fstring fuction is under the str method??
Thank you…

Your code so far


# User Editable Region

class Vector:
    def __init__(self, x, y):
        self.x = x
        self.y = y
        
    def norm(self):
        return (self.x**2 + self.y**2)**0.5
        
    def __str__(self):
        return (f'self.x, self.y')

v1 = Vector(2, 3)
print(v1.norm())
print(v1)

# User Editable Region

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Challenge Information:

Learn Special Methods by Building a Vector Space - Step 10

2

Are you just referring to the use of brackets, or the missing quote? ’

If it’s just the brackets, extra unnecessary brackets usually will not pass a test. The tests are usually designed to accept specific input and even if something might be ok syntax, it might not be what the test is expecting.

3

The above is always the string 'self.x, self.y', while you want the actual values of self.x and self.y to be printed dynamically. Therefore you need to use the replacement fields ({}) to have those values evaluated and printed.

1 Like
4

I am referring the curly brackets {}, I do not why but I thought the () were more appropiate
Thank you guys…you are the best…