437 class match_rtype(ExpectedValuePredicate):

   437 class match_rtype(ExpectedValuePredicate):

   438     """accept if the relation type is found in expected ones. Optional

   438     """accept if the relation type is found in expected ones. Optional

   439     named parameters `frometypes` and `toetypes` can be used to restrict

   439     named parameters `frometypes` and `toetypes` can be used to restrict

   440     target subject and/or object entity types of the relation.

   440     target subject and/or object entity types of the relation.

   441 

   441 

   443     :param frometypes: candidate entity types as subject of relation

   443     :param frometypes: candidate entity types as subject of relation

   444     :param toetypes: candidate entity types as object of relation

   444     :param toetypes: candidate entity types as object of relation

   445     """

   445     """

   446     def __init__(self, *expected, **more):

   446     def __init__(self, *expected, **more):

   447         self.expected = expected

   447         self.expected = expected