code: def get_all_threads(self, expand=False):
          
          if not expand:
              return self._request_threads(self._url.catalog())
  
          thread_ids = self.get_all_thread_ids()
          threads = [self.get_thread(id, raise_404=False) for id in thread_ids]
  
          return filter(None, threads)
docs: Return every thread on this board.
  
          If not expanded, result is same as get_threads run across all board pages,
          with last 3-5 replies included.
  
          Uses the catalog when not expanding, and uses the flat thread ID listing
          at /{board}/threads.json when expanding for more efficient resource usage.
  
          If expanded, all data of all threads is returned with no omitted posts.
  
          Args:
              expand (bool): Whether to download every single post of every thread.
                  If enabled, this option can be very slow and bandwidth-intensive.
  
          Returns:
              list of :mod:`basc_py4chan.Thread`: List of Thread objects representing every thread on this board.