#NEWLINE# def bind_pairs( xs , ys , env ) : #NEWLINE# #INDENT# assert ( len ( xs ) == len ( ys ) ) , ( "Can't bind %s and %s due to unequal lengths" % ( xs , ys ) ) #NEWLINE# for ( x , y ) in zip ( xs , ys ) : #NEWLINE# #INDENT# bind ( x , y , env )