code: def _setup_cached(self, filters=()):
      
      for interpreter_dir in os.listdir(self._cache_dir):
        pi = self._interpreter_from_relpath(interpreter_dir, filters=filters)
        if pi:
          logger.debug('Detected interpreter {}: {}'.format(pi.binary, str(pi.identity)))
          yield pi
docs: Find all currently-cached interpreters.