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Dmitriy Ignatiev
Courses Plus Student 6,236 Points@classmethod
confusing why it prints the same string but not convert to morse as it must. Could you please help me to understand?
test = Letter.from_string('dash-dot') print(test)
dash-dot instead of ['_', '.']
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):
output2 = []
x = string.split ('-')
for i in x:
if i == 'dash':
output2.append ('_')
elif i == 'dot':
output2.append ('.')
return cls(output2)
class S(Letter):
def __init__(self):
pattern = ['.', '.', '.']
super().__init__(pattern)
1 Answer
Kenneth Love
Treehouse Guest TeacherWhen you do Letter.from_string(), it turns the pattern you send in, like "dash-dot", into a Morse code pattern, like _ . (of course we're storing it as a list, so ['_', '.']). When you print() a Letter, though, the __str__ method turns the list of dashes and dots into a string like "dash-dot". The from_string() and __str__() methods basically do the opposite of each other.