how to rotate the list left side in python code example

Example 1: how to rotate the list in python

li=[1,2,3,4,5,6]
li[2:]+li[:2]    #rotates list left by 2

Example 2: python rotate list

def rotate_list_left(_list : list, rotation_value: int):

    result_list = _list.copy()

    for k in range(0, len(_list)):
        result_list[k-rotation_value] = _list[k]

    return result_list