Re: [Discuss-gnuradio] Python function processing block

[Eric Blossom]

On Tue, Oct 03, 2006 at 11:40:14AM -0400, Marcus Leech wrote:
> Eric Blossom wrote:
> >
> >>http://gnuradio.org/trac/browser/gnuradio/trunk/gnuradio-core/src/lib/general/gr_feval.h
> >>
> >>It defines a function 'eval' that can be called either from C++ or from
> >>Python.  In Python you can subclass this and override the eval function
> >>with whatever you want.  When the function is called from C++, control
> >>flow passes to the Python interpreter to evaluate the function and return.
> >>
> >>I haven't used it myself, but you can get a good feel for what is
> >>possible by looking at the QA code for the block at:
> >>
> >>http://gnuradio.org/trac/browser/gnuradio/trunk/gnuradio-core/src/python/gnuradio/gr/qa_feval.py
> >>

> Ok, so gr_feval_ff() appears in the C++ code, but doesn't appear to have 
> an interface generated in the SWIG stuff--
>  whazzup with that?

Looks like whomever added it, failed to add the .i file entry.
Note that in reality, it doesn't make much sense to have a _ff, since
the _dd does effectively the same thing.  All python floating point
numbers are doubles.