#NEWLINE# def _to_string( self ) : #NEWLINE# #INDENT# if ( sys . version_info [ 0 ] == 3 ) : #NEWLINE# #INDENT# return '' . join ( ( x . value for x in self . flatten ( ) ) ) #NEWLINE# #UNINDENT# else : #NEWLINE# #INDENT# return '' . join ( ( str ( x ) for x in self . flatten ( ) ) )