#NEWLINE# def fdiff( self , argindex = 1 ) : #NEWLINE# #INDENT# if ( argindex == 1 ) : #NEWLINE# #INDENT# k = 0 #NEWLINE# if ( len ( self . args ) > 1 ) : #NEWLINE# #INDENT# k = self . args [ 1 ] #NEWLINE# #UNINDENT# return self . func ( self . args [ 0 ] , ( k + 1 ) ) #NEWLINE# #UNINDENT# else : #NEWLINE# #INDENT# raise ArgumentIndexError ( self , argindex )