Why it doesn't work?

Question

I don't know what I did wrong, can someone help me to take a look on it? Sometimes when I was doing exercise in treehouse, even it looks like the same with other correct answer online, it doesn't work. And after I copy and paste the correct answer, it works, is it because of indent?

Thanks

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, string):
        pattern_list = string.split('-')
        str_patterns = []
        for blip in pattern_list:
            if blip == 'dash':
                str_patterns.append('-')
            else:
                str_patterns.append('.')
        return cls(str_patterns)

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

Answer 1 · 2018-11-22T16:57:14Z

November 22, 2018 4:57pm

Your code is very close!

The only issue I see is that the dash is being represented in the pattern by a hyphen ("-"), but it should be represented by an underscore ("_") instead.

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Heather Lau

Heather Lau

Why it doesn't work?

1 Answer

Steven Parker

Steven Parker

Heather Lau

Heather Lau