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Python

Posted by Unsubscribed User
Unsubscribed User
7,263 Points

How can I use the @classmethod?

Hi there, I am stuck on this step and as it seems I have not fully understood what this challenge needs.

I have creates the method but it returns the instant of my Letter class, that means it print again the string version of the input [dash, dot] --> [dash, dot]

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, s):
        string_list = s.split("-")
        c= []
        for l in string_list:
            if l == "dash":
                c.append('-')
            else:
                c.append('.')
        return cls(c)

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

1 Answer

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

You're almost there! But a "dash" should be represented by an underscore ("_") instead of a hyphen ("-").

Unsubscribed User
Unsubscribed User
7,263 Points

Oh thanks, I have to be more thorough. The code runs with this little change

Thanks again Steven