Combining Iterables with Zip_longest and Handling Infinities

This function uses the zip_longest function from the itertools library to combine multiple iterable objects. If they have different lengths, it uses fillvalue to fill in the missing parts. The function also handles cases with infinite iterators.

Technology Stack : itertools

Code Type : Function

Code Difficulty : Intermediate

                
                    
def zip_longest(*iterables, fillvalue=None):
    from itertools import zip_longest
    from itertools import islice
    from itertools import chain

    # 使用itertools库中的zip_longest来合并多个迭代器，如果长度不一致则用fillvalue填充
    combined = zip_longest(*iterables, fillvalue=fillvalue)
    
    # 使用islice和chain来处理可能的无限迭代器
    return list(chain.from_iterable(islice(pair, 1, None) for pair in combined))