[Jython-dev] Attempting to embed Jython

[Stephen S. <ss...@ci...>]

Folk,

I am attempting to embed  Jython in a system whose dynamic configuration
is to include Jython expressions and code fragments.  These code
fragments are runtime evaluated and effect the progress of the overall
system.   The fragments serve as statement guards, iterators, etc.
Thus, I need to do a good deal of expression evaluation, examine, in
Java, the results of the evaluation and proceed.  Not every expression
will naturally set a variable in the environment storing its results.
Thus, I would like to be able to determine the value of the evaluated
expression without resorting to a storage side effect .

The public interfaces to Py (such as runCode) return a value.  However,
in the way I have been experimenting with them, the value is always
PyNone.  In addition, a printed result of the expression evaluation is
delivered to sysout.

I am looking, therefore, for a couple of things:

1) reliably suppressing delivery of the computed result of the
expression to sysout
2) reliably delivering the computed result to the invoker of the
expression evaluation.

Any aid is appreciated.

Response by E-mail would also be appreciated.

Thanks

-steve