Re: [Jython-dev] jython exec problem

[Ype K. <yk...@xs...>]

Jim,

>>Can anyone send back with a solution to the problem contained in
>>erpFormula2 referenced below??  It obviously stems from the "^" operator as erpFormula1 is identical except for the use of math.log10 versus "^".  The runtime error I am getting is:
>>
>>TypeError: __xor__nor__rxor__ defined for these operands
>>
>>PythonInterpreter interp = new PythonInterpreter();
>>interp.set( "math", new ExtraMath() );
>>interp.exec( erpFormula2);
>>
>>String erpFormula1 = ("resultant = 10 * math.log10( TransmitPower)");
>>String erpFormula2 = ("resultant = 10 ^( TransmitPower )");

^ is the xor operator in python, and __xor__ and __rxor__ are the functions
that can implement it for either objects involved (the left and the right
one respectively). Neither 10 or TransmitPower has such a method defined.
You might try and use the built in  pow() function
http://www.python.org/doc/current/lib/built-in-funcs.html


>>Also as I am new to jython, what is the deal with the __xxxx__ method

See above.

>>calls??  I tried to subclass a PyFloat object to a java Double object using something like:
>>Double newDouble = result.__tojava__( new Double( 0.0 ) ) without success.
>>The leading and trailing underscores are a bit different.

I'm afraid I miss the point here.

>>thanks to any and all who respond....Jim.

My pleasure,
Ype