I am learning python and just started reading about iterators and iterables , I have read this post and this post both which try to explain this concept. However when reading this example. I have posted it below
class zrange:
def __init__(self, n):
self.n = n
def __iter__(self):
return zrange_iter(self.n)
class zrange_iter:
def __init__(self, n):
self.i = 0
self.n = n
def __iter__(self):
# Iterators are iterables too.
# Adding this functions to make them so.
return self
def next(self):
if self.i < self.n:
i = self.i
self.i += 1
return i
else:
raise StopIteration()
Now the above example is being used as such
>>> z = zrange(5)
>>> list(z)
[0, 1, 2, 3, 4]
My question is when or who calls the iter method ?
and my next question was what was the point of adding def __iter__(self)
in class zrange_iter ?
