Design-Patterns-In-Python/iterator/iterator.py at master · mvladk/Design-Patterns-In-Python · GitHub

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from abc import ABCMeta, abstractmethod

class IIterator(metaclass=ABCMeta):
    @staticmethod
    @abstractmethod
    def has_next():
        """Returns Boolean whether at end of collection or not"""

    @staticmethod
    @abstractmethod
    def next():
        """Return the object in collection"""

class Iterable(IIterator):
    def __init__(self):
        self.index = 0
        self.maximum = 7

    def next(self):
        if self.index < self.maximum:
            x = self.index
            self.index += 1
            return x
        else:
            raise Exception("AtEndOfIteratorException", "At End of Iterator")

    def has_next(self):
        return self.index < self.maximum

ITERABLE = Iterable()

while ITERABLE.has_next():
    print(ITERABLE.next())


# print(ITERABLE.next())
# print(ITERABLE.next())
# print(ITERABLE.next())
# print(ITERABLE.next())
# print(ITERABLE.next())
# print(ITERABLE.next())
# print(ITERABLE.next())
# print(ITERABLE.next())