#NEWLINE# def getBytes( self ) : #NEWLINE# #INDENT# 'Return the raw bytes of this header.\n\n            :returns: **str** byte representation of this header\n            ' #NEWLINE# fmt = ( '!HB' if ( self . link_version <= 3 ) else '!IB' ) #NEWLINE# return struct . pack ( fmt , self . circ_id , self . cmd )