Combining Iterables with FillValue

The function is used to combine multiple iterable objects into an iterator. If the length of the iterable objects is different, the fillvalue is used to fill the shorter sequence.

Technology Stack : itertools, collections

Code Type : Function

Code Difficulty : Intermediate

                
                    
def zip_longest(*args, fillvalue=0):
    from itertools import zip_longest
    from collections import deque
    longest = max(map(len, args), default=0)
    result = []
    for i in range(longest):
        batch = [deque(arg)[i:] for arg in args]
        result.append([item for item in zip_longest(*batch, fillvalue=fillvalue) if item is not fillvalue])
    return result