docs: def clear(self, match="*", count=1000):
          """ Removes all |{key: value}| entries in :prop:key_prefix of
              :prop:_client
          """
          cursor = '0'
          while cursor != 0:
              cursor, keys = self.scan(cursor=cursor, match=match, count=count)
              if keys:
                  self._client.delete(*keys)