code: def filter_cookies(self, request_url: URL=URL()) -> 'BaseCookie[str]':
          
          self._do_expiration()
          request_url = URL(request_url)
          filtered = SimpleCookie()
          hostname = request_url.raw_host or ""
          is_not_secure = request_url.scheme not in ("https", "wss")
  
          for cookie in self:
              name = cookie.key
              domain = cookie["domain"]
  
              # Send shared cookies
              if not domain:
                  filtered[name] = cookie.value
                  continue
  
              if not self._unsafe and is_ip_address(hostname):
                  continue
  
              if (domain, name) in self._host_only_cookies:
                  if domain != hostname:
                      continue
              elif not self._is_domain_match(domain, hostname):
                  continue
  
              if not self._is_path_match(request_url.path, cookie["path"]):
                  continue
  
              if is_not_secure and cookie["secure"]:
                  continue
  
              # It's critical we use the Morsel so the coded_value
              # (based on cookie version) is preserved
              mrsl_val = cast('Morsel[str]', cookie.get(cookie.key, Morsel()))
              mrsl_val.set(cookie.key, cookie.value, cookie.coded_value)
              filtered[name] = mrsl_val
  
          return filtered
docs: Returns this jar's cookies filtered by their attributes.