我是 Python 的初學者。我有一個像下面這樣的文本文件，里面有數千個文檔（從 id=1 到 id=10000）：<doc id=1>    <label>1</label>    <summary>        I think you are right    </summary>    <short_text>        I think you are right. Because I have once read the book in the same topic.    </short_text></doc>有沒有什么方便的方法來讀取文本文件并將內容存儲在實例中？class ShortText:    def __init__(self, my_id, human_label, summary, short_text):        self.id = my_id                 self.human_label = human_label            self.summary = summary         self.short_text = short_text    def __str__(self):        '''        For printing purposes.        '''        return '%d\t%s\t%s\t%s' % (self.id, self.human_label, self.summary, self.short_text)def load_file(filename):    #retrieve the original text     with codecs.open(filename, encoding='utf-8') as f:        data = f.read()    #how to get values from tags and put it below？        my_id =         human_label =         summary =         short_text =         instances[my_id] = ShortText(my_id, human_label, summary, short_text)    return instances