Python Zip Longest Function Implementation

This function zips multiple iterable objects into a single iterable. If the iterables are of uneven length, the specified value is used to fill in the missing values.

Technology Stack : itertools, collections

Code Type : Function

Code Difficulty : Intermediate

                
                    
def zip_longest(*args, fillvalue=0):
    """
    Zip the elements of the provided iterables (args) together into a single iterable.
    If the iterables are of uneven length, missing values are filled with the fillvalue.
    """
    from itertools import zip_longest
    from collections import deque

    iterators = [deque(iter(i)) for i in args]
    result = []
    while iterators:
        result.append([next(iter, fillvalue) for iter in iterators if iter])
        iterators = [deque(list(iter)) for iter in iterators if iter]
    return result