W3School TIY Editor

class MyNumbers:

  def __iter__(self):

    self.a = 1

    return self

​

  def __next__(self):

    x = self.a

    self.a += 1

    return x

​

myclass = MyNumbers()

myiter = iter(myclass)

​

print(next(myiter))

print(next(myiter))

print(next(myiter))

print(next(myiter))

print(next(myiter))