pylint-errors
E0301 (non-iterator-returned)
Problematic code:
class Iterator:
def __init__(self, end, start=0):
self.n = start
self.end = end
def __iter__(self):
return self
Correct code:
class Iterator:
def __init__(self, end, start=0):
self.n = start
self.end = end
def __iter__(self):
return self
def __next__(self):
if self.n <= self.end:
n = self.n
self.n += 1
return n
raise StopIteration
Rationale:
Used when an __iter__ method returns something which is not an iterable
(i.e. has no __next__ method).