#NEWLINE# def prev( self , header , same_or_high = False , offset = ( - 1 ) ) : #NEWLINE# #INDENT# 'same than next, but in reversed direction\n        ' #NEWLINE# ( index , headers ) = self . _index ( header , same_or_high ) #NEWLINE# if ( index == 0 ) : #NEWLINE# #INDENT# return None #NEWLINE# #UNINDENT# return headers [ ( index + index ) ]