"""DOM parser for Video search resultsImplement a simple DOM parser for the Yahoo Search Web Servicesvideo search APIs."""__revision__ = "$Id: video.py,v 1.4 2005/10/27 18:07:59 zwoop Exp $"__version__ = "$Revision: 1.4 $"__author__ = "Leif Hedstrom <leif@ogre.com>"__date__ = "Thu Oct 27 10:47:24 PDT 2005"from yahoo.search import parser, dom## Video Search DOM parser#class VideoSearch(dom.DOMResultParser):    """VideoSearch - DOM parser for Video Search    Each result is a dictionary populated with the extracted data from the    XML results. The following keys are always available:        Title            - The title of the video file.        Summary          - Summary text associated with the video file.        Url              - The URL for the video file or stream.        ClickUrl         - The URL for linking to the video file.        RefererUrl       - The URL of the web page hosting the content.        FileSize         - The size of the file, in bytes.        FileFormat       - One of avi, flash, mpeg, msmedia, quicktime                           or realmedia.        Duration         - The duration of the video file in seconds.        Streaming        - Whether the video file is streaming or not.    The following attributes are optional, and might not be set:        Height           - The height of the keyframe Yahoo! extracted                           from the video, in pixels.        Width            - The width of the keyframe Yahoo! extracted                           from the video, in pixels.        Channels         - Channels in the audio stream.        Thumbnail        - The URL of the thumbnail file.        Publisher        - The creator of the video file.        Restrictions     - Provides any restrictions for this media                           object. Restrictions include noframe and                           noinline.        Copyright        - The copyright owner.    If present, the Thumbnail value is in turn another dictionary, which will    have these keys:        Url             - URL of the thumbnail.        Height          - Height of the thumbnail in pixels (optional).        Width           - Width of the thumbnail in pixels (optional).    Example:        results = ws.parse_results(dom)        for res in results:            print "%s - %s bytes" % (res.Title, res.FileSize)    """    def _init_res_fields(self):        """Initialize the valid result fields."""        super(VideoSearch, self)._init_res_fields()        self._res_fields.extend((('RefererUrl', None, None),                                 ('FileSize', None, int),                                 ('FileFormat', None, str),                                 ('Height', 0, int),                                 ('Width', 0, int),                                 ('Streaming', None, parser.string_to_bool),                                 ('Duration', None, float),                                 ('Channels', "", str),                                 ('Publisher', "", None),                                 ('Restrictions', "", str),                                 ('Copyright', "", None)))    def _parse_result(self, result):        """Internal method to parse one Result node"""        res = super(VideoSearch, self)._parse_result(result)        node = result.getElementsByTagName('Thumbnail')        if node:            res['Thumbnail'] = self._tags_to_dict(node[0], (('Url', None, None),                                                            ('Height', 0, int),                                                            ('Width', 0, int)))        else:            res['Thumbnail'] = None        return res## local variables:# mode: python# indent-tabs-mode: nil# py-indent-offset: 4# end: