Merging Iterables with Fillvalue in Zip Longest

The function merges multiple iterable objects into one iterator, if one of the iterable objects is exhausted, it fills the remaining positions with fillvalue.

Technology Stack : Iterator

Code Type : Iterator

Code Difficulty : Intermediate

                
                    
def zip_longest(*args, fillvalue=None):
    iters = [iter(arg) for arg in args]
    while True:
        result = []
        for i, it in enumerate(iters):
            try:
                result.append(next(it))
            except StopIteration:
                result.append(fillvalue)
        if len(result) == len(args):
            break
    return result