Extending Zip Functionality with Fillvalue

The function takes multiple iterable objects as arguments, combines them into tuples, and if any iterable is exhausted, it fills the remaining tuples with `fillvalue`.

Technology Stack : Built-in functions

Code Type : Function

Code Difficulty : Intermediate

                
                    
def zip_longest(*args, fillvalue=None):
    """
    This function is similar to the built-in `zip` function, but it allows the iteration to be
    continued until the longest input sequence is exhausted. If the sequences are of unequal
    lengths, missing values are filled in with `fillvalue`.
    """
    iterators = [iter(arg) for arg in args]
    while True:
        result = []
        for iterator in iterators:
            try:
                result.append(next(iterator))
            except StopIteration:
                result.append(fillvalue)
        if len(result) == 0:
            break
        yield tuple(result)

# JSON output