divide list ['a', 'b', 'c', '1', '2', '3'] evenly into three separate list

def split_list(input_list):
    """
    Split a list into 3 evenly sized chunks
    """
    length = int(round(len(input_list) / 3.0))
    return [input_list[i * length:(i + 1) * length] for i in range(3)]

split_list(['a', 'b', 'c', '1', '2', '3'])