def __init__(self, filepath):
data_folder = join(dirname(dirname(__file__)), "<STR_LIT:data>")<EOL>data_file = join(data_folder, filepath)<EOL>self.data_file = data_file<EOL>self.words_data = None<EOL>
load words from Ho Ngoc Duc's dictionary

        :param str filepath: filename of dictionary data
        :type filepath: str