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Python

Ryan Gostic
Ryan Gostic
20,790 Points
Posted by Ryan Gostic
Ryan Gostic
20,790 Points

No method named from_string

I clearly have a method named from_string in my Letter class.

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, strCode):
        array = strCode.split("-")
        selfPattern = 0
        for v in array:
            if v == "dash":
                selfPattern.append("-")
            elif v == "dot":
                selfPattern.append(".")
        return cls(selfPattern)

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

1 Answer

lemelleio
lemelleio
10,874 Points

Hey again,

Your code is almost correct, just two things and it passes. As far as the errors go in these code challenges it seems the validation is written is such a way to give a very general error at times when they're are multiple things wrong.

anyway,

    @classmethod
    def from_string(cls, strcode):
        array = strcode.split("-")
        selfpattern = [] #changed from 0 to a list
        for v in array:
            if v.lower() == "dash":
                selfpattern.append("_") #changed from - to an _
            elif v.lower() == "dot":
                selfpattern.append(".")
            else:
                pass
        return cls(selfpattern)