#NEWLINE# def test_substitute_dummies_NO_operator( ) : #NEWLINE# #INDENT# ( i , j ) = symbols ( 'i j' , cls = Dummy ) #NEWLINE# assert ( substitute_dummies ( ( ( att ( i , j ) * NO ( ( Fd ( i ) * F ( j ) ) ) ) - ( att ( j , i ) * NO ( ( Fd ( j ) * F ( i ) ) ) ) ) ) == 0 )