arcpy method to create a relationship between features

Dear List

I am using a relationship class (1 : n) between two feature classes (a : B). To relate newly imported features of the feature class B with the individual feature of a I would like to use ArcPy in the same workflow.

Is there an equivalent of the ArcObjects method IRelationshipClass.CreateRelationship(origin, destination)?

Looking forward to any hint.

Best regards,
Yvo