def _webcastdata(self):
    if self.webcastdata:
        return self.webcastdata
    from_data = {'lessonKey': self.lessonkey}
    r = requests.post('https://www.eeo.cn/saasajax/webcast.ajax.php?action=getLessonWebcastData', data=from_data)
    self.webcastdata = json.loads(r.text)
    return self.webcastdata
def _webcastdata(self):
    if self.webcastdata:
        return self.webcastdata
    from_data = {'lessonKey': self.lessonkey}
    r = requests.post('https://www.eeo.cn/saasajax/webcast.ajax.php?action=getLessonWebcastData', data=from_data)
    self.webcastdata = json.loads(r.text)
    return self.webcastdata