Python Zip Longest Equivalent with Fillvalue

This function is used to pack multiple iterable objects into tuples, if the elements in an iterable object are insufficient, it uses fillvalue to fill.

Technology Stack : itertools

Code Type : Function

Code Difficulty : Intermediate

                
                    
def zip_longest(*args, fillvalue=0):
    """
    从a~z的顺序中，使用了内置的`zip_longest`函数，用于将可迭代对象打包成元组，如果某个可迭代对象中缺少元素，则使用fillvalue填充。
    """
    from itertools import zip_longest

    def next_item():
        for item in args:
            if len(item) > 0:
                yield item[0]
                item.pop(0)

    while True:
        try:
            yield tuple(next_item())
        except IndexError:
            break