Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community!
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.Start your free trial
Gilbert Craig2,102 Points
Classmethod contruction challenge - stumped
I am definitely stuck with this one ..... Any pointer greatly appreciated
@classmethod def from_string(cls, string): answer =  for char in string: if char == 'dot': answer.append('.') elif char == 'dash': answer.append('_') return cls('-'.join(answer))
Jeff MudayTreehouse Moderator 28,372 Points
You are very close! I can see you understood the concept pretty well.
I fixed the code and commented the lines where changes should take place.
Think of 'dot' and 'dash' as tokens in a string where tokens are separated by hyphens rather than thinking of the string in terms of a string iterable.
So... we create a LIST called tokens, which we split on the hyphens '-'... then your code will work. Also, the question wanted a LIST to be returned -- you built the list correctly as 'answer' -- so rather than joining it again to be a single string, just return the list.
Good luck with Python, it is worth the effort!
@classmethod def from_string(cls, string): answer =  tokens = string.split('-') # ADD THIS for char in tokens: # CHANGE ITERABLE to TOKENS LIST if char == 'dot': answer.append('.') elif char == 'dash': answer.append('_') return cls(answer) # RETURN THE LIST ANSWER RATHER THAN JOINING