#NEWLINE# def count( self , start , stop ) : #NEWLINE# #INDENT# 'Count the number of elements bewteen *start* and *stop*.' #NEWLINE# s1 = self . pickler . dumps ( start ) #NEWLINE# s2 = self . pickler . dumps ( stop ) #NEWLINE# return self . backend_structure ( ) . count ( s1 , s2 )