Zip Longest Function with Fillvalue

The function returns an iterator that merges multiple iterable objects into one iterator. If the iterable objects are of unequal lengths, it fills the shorter ones with a specified fill value.

Technology Stack : Built-in library

Code Type : Function

Code Difficulty : Intermediate

                
                    
def zip_longest(*iterables, fillvalue=None):
    # This function is similar to zip(), but the iterator(s) shorter than the longest one will be filled with a specified value.

    # Iterate over each iterable and pair it with the fillvalue if it's exhausted.
    iterators = [iter(it) for it in iterables]
    while True:
        result = []
        for it in iterators:
            try:
                result.append(next(it))
            except StopIteration:
                result.append(fillvalue)
        if not result:
            break
        yield tuple(result)