#NEWLINE# def participate( self , identity , experiment_name , variant ) : #NEWLINE# #INDENT# '\n        Set the variant for a specific user and mark a participation for the\n        experiment.\n\n        Participation will *only* be marked for visitors who have been verified\n        as humans (to avoid skewing reports with requests from bots and web\n        crawlers).\n        ' #NEWLINE# self . set_variant ( identity , experiment_name , variant ) #NEWLINE# if self . is_verified_human ( identity ) : #NEWLINE# #INDENT# self . mark_participant ( self , variant )