Re: [Discuss-gnuradio] GNU Radio conditional operation

[Marcus D. Leech]

On 27/04/2011 12:27 PM, Songsong Gee wrote:
> Thank you for your answer.
>
> I have one more question,
> In that directory, there are lots of python script,
> Unfortunately, I'm not good at that language
> and I have just learned GNU Radio with GRC
>
> Is that what I wanted now available in GRC?
Generally, custom processing blocks, which is what you'll likely be 
having to do, are written in C++.

In Gnu Radio, the Python is used as a kind of "glue" that sets up and 
"manages" flow-graphs, but the
  underlying signal-processing elements, and buffer and task scheduling 
is generally handled in C code.
  The vast majority of those blocks have mappings into Python (via 
Swig) to allow the Python
  ``management` structure to manage them.

GRC emits Python code, using the underlying Gnu Radio conventions and 
mechanisms to form a flow-graph.

Blocks you write yourself can be ``manifested`` (via Swig) into Python, 
and then ``manifested`` via XML into
  GRC.

The XML that GRC uses exists as a way of describing the ``surface`` of a 
processing block, and also as a way of
  describing the Python code that must be emitted in order to plug the 
block into the overall flow-graph.