Combining Iterables with Fillvalue

This function combines iterable objects of different lengths into tuples, using a specified fillvalue to fill if an iterable is exhausted.

Technology Stack : Built-in functions, iterators

Code Type : Function

Code Difficulty : Intermediate

                
                    
def zip_longest(*args, fillvalue=0):
    """将可迭代对象组合成元组，如果最短的序列耗尽，则用fillvalue填充。

    Args:
        *args: 可变数量的可迭代对象。
        fillvalue: 当序列耗尽时用于填充的值。

    Returns:
        迭代器，产生元组。
    """
    iterators = [iter(arg) for arg in args]
    longest = max(len(it) for it in iterators)
    for i in range(longest):
        yield tuple(next(it, fillvalue) for it in iterators)