class Reverse:

    """Iterator for looping over a sequence backwards."""

    def __init__(self, data):

        self.data = data

        self.index = len(data)

​

    def __iter__(self):

        return self

​

    def __next__(self):

        if self.index == 0:

            raise StopIteration

        self.index = self.index - 1

        return self.data[self.index]

class CoinFlips:

    def __init__(self, number_of_flips):

        self.number_of_flips = number_of_flips # Store the total number of flips

        self.counter = 0

​

    def __iter__(self):

        return self # Return a reference of the iterator

    def __next__(self):

        if self.counter < self.number_of_flips:

            self.counter += 1

            return random.choice(["H", "T"]) # Flip the next coin, return the output

        else: # Otherwise, stop execution with StopIteration

            raise StopIteration

while True:

    try:

        next(three_flips) # Pull the next element of three_flips

    # Catch a stop iteration exception

    except StopIteration:

        print("Completed all coin flips!")

        break

fruits = ["apples", "bananas", "cherries", "pears", "plums"]

fruitIterator = iter(fruits);

print(next(fruitIterator))

print(next(fruitIterator))

print(next(fruitIterator))

def iter(times):

    it = 1

    for i in range(times):

        its = it * 2

        it = its

    return it

​

while True:

    print()

    print(iter(int(input("how many iteration? : "))))

​

Iterable objects, such as strings, lists, and tuples.