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Python

Posted by Edward A. Polanco Murillo
Edward A. Polanco Murillo
2,872 Points

I am just not getting this.

I have been struggling with OOP for a while now. And this is no different. For the life of me I cannot figure this out. I don't believe I wrote this particular code correctly.

Is there anyone that can give me a thorough explanation on how this works?

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, patternlist):
        return cls(PatternList)


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

1 Answer

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

You have a bit of work to do yet. The argument to the method won't be a pattern, but a string with some combination of the words "dash" and "dot" and hyphens. So this method will need to do essentially the opposite of what the "__str__" method does to convert that string into a pattern before returning the new instance.

Also note that your parameter is named "patternlist" (with lower-case "p") but you referenced "PatternList" (with capital "P") which is a different identifier.

Edward A. Polanco Murillo
Edward A. Polanco Murillo
2,872 Points

thanks for the response Ill try this again and see if I can try to understand it.