Welcome to the Treehouse Community
The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.
Dmitriy IgnatievCourses Plus Student 6,236 Points
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)
Kenneth LoveTreehouse Guest Teacher
When 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
Letter, though, the
__str__ method turns the list of dashes and dots into a string like
__str__() methods basically do the opposite of each other.