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Lucas Alexander
Lucas Alexander
3,528 Points

cls(ptrn) just recreates the initial string since cls() runs the original letter init code

Just a bit confused by the question and what it's expecting to return. I get that it's looking for a class instance of Letter, but sending in the pattern and returning the newly constructed pattern though cls() just basically resets that work. Obviously can't send back just the new pattern as it's just a list and not a class instance.

I notice in the question it mentions pattern([...]), is it expecting an instance of a pattern object? I don't know, just a bit confused about what the question is asking for.

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 == '.':
        return '-'.join(output)

    def from_string(cls, str_pattern):
        ptrn = []
        for val in str_pattern.split('-'):
            if val == 'dash':
            elif val == 'dot':
        return cls(ptrn)

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

2 Answers

Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points

You are SO close! The dash should be an underscore instead of a hyphen.

Post back if you need more help. Good luck!!!

Lucas Alexander
Lucas Alexander
3,528 Points

I am become silly, destroyer of worlds.

Thank you kindly, hahah!

For a dash you should append an underscore. You are currently appending a hyphen.