code: def start_download_thread(self):
  		'''start the downloader'''
  		if self._download_thread:
  			return
  		t = threading.Thread(target=self.downloader)
  		t.daemon = True
  		self._download_thread = t
  		t.start(f start_download_thread(self):
  		'''start the downloader'''
  		if self._download_thread:
  			return
  		t = threading.Thread(target=self.downloader)
  		t.daemon = True
  		self._download_thread = t
  		t.start()
docs: start the downloader