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Python

Yang Bi
Yang Bi
10,079 Points

No method named "from_string"

I got an error No method named 'from_string'

can anyone tell me what's wrong with my code?

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):
        result = []
        mylist = string.split('-')
        for item in mylist:
            if item == 'dash':
                result.appned('_')
            if item == 'dot':
                result.append('.')
            else:
                continue
        return cls(pattern=result)


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

1 Answer

Steven Parker
Steven Parker
229,965 Points

A syntax error in the code will cause the method to not be defined.

In this case, it's caused by spelling "appned" instead of "append". Otherwise, the code is correct and will pass the challenge when fixed.

Yang Bi
Yang Bi
10,079 Points

Thank you!!