Handling Unequal Sequence Lengths with zip_longest

This function mimics the behavior of the zip function but can handle sequences of different lengths. When the sequences are of unequal length, it fills the shorter ones with a fillvalue.

Technology Stack : Built-in function zip, iterators

Code Type : Function

Code Difficulty : Intermediate

                
                    
def zip_longest(*args, fillvalue=()):
    """
    类似于zip函数，但会返回一个迭代器，其中较短的输入序列会用fillvalue填充。
    """
    iters = [iter(arg) for arg in args]
    while True:
        yield tuple(next(it, fillvalue) for it in iters)