Level 5 : Filtering numbers in an iterator. 


class FilterIterator:
    def __init__(self, data, condition):
        self.data = data
        self.condition = condition
        self.index = 0

    def __iter__(self):
        return self

    def __next__(self):
        while self.index < len(self.data):
            value = self.data[self.index]
            self.index += 1
            if self.condition(value):
                return value
        raise StopIteration

it = iter(FilterIterator([1, 2, 3, 4, 5, 6], lambda x: x % 2 == 0))
print(list(it))
Author: SandhyaR | Tags: iterator | 1859+ Python FAQs | Share
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