С помощью классов найти 20 первых натуральных чисел, делящихся нацело на 17

>>> type(50)
<class 'int'>

r = range(500)
list(filter(bool, sorted(list(r[::13]) + list(r[::17]))))[:20]

class EnumeratorIterator(object):
    def __init__(self, step):
        self.current = 0
        self.step = step
 
    def __next__(self):
        self.current += self.step
        return self.current
 
 
class Enumerator(object):
    def __init__(self, step):
        self.step = step
 
    def __iter__(self):
        return EnumeratorIterator(self.step)
 
 
 
class ZipperIterator(object):
    def __init__(self, en1, en2):
        self.en1 = en1
        self.en2 = en2
        self.next = 0
        self.other = 0
 
        self.curr_iterator = en1.__iter__()
        self.other_iterator = en2.__iter__()
 
    def __next__(self):
        while self.next < 500:
            if self.next <= self.other:
                to_return = self.next
                self.next = self.curr_iterator.__next__()
                return to_return
            else:
                self.next, self.other = self.other, self.next
                self.curr_iterator, self.other_iterator = self.other_iterator, self.curr_iterator
        raise StopIteration
 
class Zipper(object):
    def __init__(self, en1, en2):
        self.en1 = en1
        self.en2 = en2
 
    def __iter__(self):
        return ZipperIterator(self.en1, self.en2)
 
en13 = Enumerator(13)
en17 = Enumerator(17)
 
z = Zipper(en13, en17)
for i in z:
    print(i)

class ZipperIterator(object):
    def __init__(self, en1, en2, limit, limit_quantity):
        self.next = 0
        self.other = 0
        self.limit = limit
        self.limit_quantity = limit_quantity
        self.counter = 0
 
        self.curr_iterator = en1.__iter__()
        self.other_iterator = en2.__iter__()
 
    def __next__(self):
        while self.next < self.limit and self.counter < self.limit_quantity:
            if self.next <= self.other:
                to_return = self.next
                self.next = self.curr_iterator.__next__()
                self.counter += 1
                return to_return
            else:
                self.next, self.other = self.other, self.next
                self.curr_iterator, self.other_iterator = self.other_iterator, self.curr_iterator
        raise StopIteration
 
class Zipper(object):
    def __init__(self, en1, en2, limit, limit_quantity):
        self.en1 = en1
        self.en2 = en2
        self.limit = limit
        self.limit_quantity = limit_quantity
 
    def __iter__(self):
        return ZipperIterator(self.en1, self.en2, self.limit, self.limit_quantity)
 
en13 = Enumerator(13)
en17 = Enumerator(17)
 
z = Zipper(en13, en17, 500, 20)
for i in z:
    print(i)