python 通过列表元素值截取列表并获取长度

def count_range_in_list(li, min, max):
    ctr =
    for x in li:
        if min <= x <= max:
            ctr +=
    return ctr  

list1 = [,,,,,,,,]
print(count_range_in_list(list1, , ))  

list2 = ['a','b','c','d','e','f']
print(count_range_in_list(list2, 'a', 'e'))