#NEWLINE# def __init__( self , rate = 1.2 ) : #NEWLINE# #INDENT# 'Time stretching' #NEWLINE# AbstractTimeStretch . __init__ ( self ) #NEWLINE# self . rate = float ( self ) #NEWLINE# if ( rate <= 0 ) : #NEWLINE# #INDENT# raise ValueError ( 'rate parameter must be strictly positive.' )