Vector median or tuple median from a nested list

vec_median.py

import bpy
from mathutils import Vector

def get_median(input_lists):

    _list = []
    for vec_list in input_lists:
        median = Vector()
        for vec in vec_list:
            if isinstance(vec, Vector):
                median = median + vec
            elif isinstance(vec, tuple) and (len(vec) == 3):
                median = median + Vector(vec)
            elif isinstance(vec, tuple) and (len(vec) == 2):
                median = median + Vector((vec[0], vec[1], 0))

        # in case of no vectors in the list, return 0 vector
        # if one vector, that's the media
        len_sublist = len(vec_list)
        if len_sublist > 1:
            median = median / len_sublist
        elif len_sublist == 0:
            median = Vector()

        _list.append(median)

    return _list

list1 = [(1,0,0), (2,0,0)]
list2 = []


f = get_median([list1, list2])
print(f)