#NEWLINE# def filter_username( self , value ) : #NEWLINE# #INDENT# username_lower = value . lower ( ) #NEWLINE# username_filter = ( ( F ( iusername__prefix = username_lower ) | F ( idisplay_name__prefix = username_lower ) ) | F ( itwitter_usernames__prefix = username_lower ) ) #NEWLINE# return self . _filter_by_users ( username_filter )