'constructor'

def __init__(self, fetcher, parser, saver, url_filter=None):

    self._url_filter = url_filter
    self._inst_fetcher = fetcher
    self._inst_parser = parser
    self._inst_saver = saver
    self._number_dict = {TPEnum.TASKS_RUNNING: 0, TPEnum.URL_FETCH: 0, TPEnum.HTM_PARSE: 0, TPEnum.ITEM_SAVE: 0, TPEnum.URL_NOT_FETCH: 0, TPEnum.HTM_NOT_PARSE: 0, TPEnum.ITEM_NOT_SAVE: 0}
    return
