code: def _tuple_requested(self, namespace_tuple):
          
          if not isinstance(namespace_tuple[0], unicode):
              encoded_db = unicode(namespace_tuple[0])
          else:
              encoded_db = namespace_tuple[0]
          if not isinstance(namespace_tuple[1], unicode):
              encoded_coll = unicode(namespace_tuple[1])
          else:
              encoded_coll = namespace_tuple[1]
  
          if namespace_tuple is None:
              return False
          elif len(self._requested_namespaces) is 0:
              return True
          for requested_namespace in self._requested_namespaces:
              if  ((((requested_namespace[0]) == u'*') or
                   (encoded_db == requested_namespace[0])) and
                  (((requested_namespace[1]) == u'*') or
                   (encoded_coll == requested_namespace[1]))):
                  return True
          return False
docs: Helper for _namespace_requested. Supports limited wildcards