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Kars Jansens
5,348 PointsI'm not sure why this isn't working.. {python}
Question: Let's use str to turn Python code into Morse code! OK, not really, but we can turn class instances into a representation of their Morse code counterparts.
I want you to add a str method to the Letter class that loops through the pattern attribute of an instance and returns "dot" for every "." (period) and "dash" for every "_" (underscore). Join them with a hyphen.
I've included an S class as an example (I'll generate the others when I test your code) and it's str output should be "dot-dot-dot".
It works in workspave and I can't find the problem.
class Letter:
def __init__(self, pattern=None):
self.pattern = pattern
def __str__(self, pattern):
lista = []
for item in pattern:
if item == ".":
lista.append("dot")
if item == "_":
lista.append("dash")
string = "-".join(lista)
return string
class S(Letter):
def __init__(self):
pattern = ['.', '.', '.']
super().__init__(pattern)
1 Answer
Chris Freeman
Treehouse Moderator 68,457 PointsYou are very close! The __str__ method of the class should operate on the instance attribute pattern and not on a pattern passed into the method. Remove pattern from the method parameter list and loop over items in self.pattern.
Post back if you need more help. Good luck!