def send_img(self, user_id, file_path):
        """
        @brief      send image
        @param      user_id  String
        @param      file_path  String
        @return     Bool: whether operation succeed
        """
        response = self.webwxuploadmedia(file_path)
        media_id = ""
        if response is not None:
            media_id = response['MediaId']
        return self.webwxsendmsgimg(user_id, media_id)

        @brief      send image
        @param      user_id  String
        @param      file_path  String
        @return     Bool: whether operation succeed
        
wxbot_project_py2.7/wechat/wechat_apis.py