#NEWLINE# def _conflate_stems( self , pivot_set , tokens ) : #NEWLINE# #INDENT# for token in tokens : #NEWLINE# #INDENT# stem_ids = self . graph . get_token_stem_id ( self . stemmer . stem ( token ) ) #NEWLINE# if ( not stem_ids ) : #NEWLINE# #INDENT# continue #NEWLINE# #UNINDENT# pivot_set . add ( tuple ( stem_ids ) ) #NEWLINE# pivot_set . difference_update ( stem_ids )