Merging Iterables with Fillvalue

This function merges multiple iterable objects into an iterator. If an iterable object is exhausted, fillvalue is used to fill in.

Technology Stack : itertools.zip_longest

Code Type : Function

Code Difficulty : Intermediate

                
                    
def zip_longest(*args, fillvalue=None):
    iters = [iter(arg) for arg in args]
    while True:
        result = []
        for iter_ in iters:
            try:
                result.append(next(iter_))
            except StopIteration:
                result.append(fillvalue)
        if len(result) == 1 and result[0] is fillvalue:
            return
        yield tuple(result)