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! While you're at it, check out some resources Treehouse students have shared here.
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
daniel steinberg
14,651 Points"Add an __iter__ method to the Letter class so the letter's pattern can be iterated through. "
Below I have commented out the "iter" method and the str method still iterates thru self.pattern. So, what is the purpose of iter?
class Letter: def init(self, pattern=None): self.pattern = pattern def str(self): test=[] for x in self.pattern: if x == ".": test.append("dot") elif x == "_": test.append("dash") return "-".join(test)
# def __iter__(self):
# yield from self.pattern
class S(Letter): def init(self): pattern = ['','.','', '.', '.'] super().init(pattern)
test = S() print(test) dash-dot-dash-dot-dot
class Letter:
def __init__(self, pattern=None):
self.pattern = pattern
def __str__(self):
output = []
for blip in self.pattern:
if blip == '.':
output.append('dot')
else:
output.append('dash')
return '-'.join(output)
class S(Letter):
def __init__(self):
pattern = ['.', '.', '.']
super().__init__(pattern)
1 Answer
adrian miranda
13,561 Pointsself.pattern is a list. Class list already has its own iterator. You are not adding __iter__ to list.
You are defining an __iter__ on your own class letter.