Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python

Not sure if my instance is wrong or my return value

Not sure if my instance is wrong or my return value

morse.py
class Letter:
    def __init__(self, pattern=None):
        self.pattern = pattern

    def __iter__(self):
        yield from self.pattern

    def __str__(self):
        output = []
        for blip in self:
            if blip == '.':
                output.append('dot')
            else:
                output.append('dash')
        return '-'.join(output)

    @classmethod
    def from_string(cls,""):
        self.pattern = pattern
        return cls


class S(Letter):
    def __init__(self):
         pattern = ['.', '.', '.']
         super().__init__(pattern)

1 Answer

Jeff Muday
MOD
Jeff Muday
Treehouse Moderator 28,720 Points

I am shooting from the hip here-- this may or may not be what you were looking for.

Your class method appears to require a little help. You needed the parameter "pattern", and in the method the "self" parameter is "cls" so you need to reference the object with it.

    @classmethod
    def from_string(cls, pattern=""):
        cls.pattern = pattern
        return cls