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Python

George Clement
George Clement
2,816 Points

not sure what I'm missing but this works in my IDE >>> from noclass import S >>> S().from_string("dash-dot")

not sure why but this works in my IDE but not on the site

>>> from noclass import S
>>> S().from_string("dash-dot")
['_', '.']

I must be missing something

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, str):
        output = []
        for blip in str.split("-"):
            if blip == "dot":
                output.append('.')
            if blip == "dash":
                output.append('_')

        return output


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

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,388 Points

You are very close! The challenge asks that you return an instance of the class with the pattern extracted from the string. This can be done in your return statement:

return cls(output)

Also, it is not a good practice to used reserved words or built-in functions names as variable names. Best to use “string” instead of str.

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