Re: [Discuss-gnuradio] how to access elements in case of multi flow graph

[Eric Blossom]

On Tue, Jun 09, 2009 at 05:07:53PM +0530, Sheshanandan KN wrote:
> hi all,
> I have created a multiple flow graph code for my experimentation as
> per the document - ' writing python applications using gnuradio'. As
> per this document, the individual flow graphs are connected as per the
> following lines of code:
> 
> class my_top_block(gr.top_block):
>         def __init__(self):
>                gr.top_block.__init__(self)
> 
>                tx_path = transmit_path()
>                rx_path =  receive_path()
> 
>                self.connect(tx_path)
>                self.connect(rx_path)
> 
> I have instantiated this class as tb = my_top_block(). I am not
> getting how to access the elements inside these classes. For example,
> if I have an element like 'self.msgq'  in the class receive_path. How
> to access this 'msgq' from my_top_block().
> 
> I tried giving tb.rx_path.msgq and tb.msgq directly. But this does not work.
> 
> Please let me know how to go about this.

The Python 2.X tutorial will probably be helpful: http://www.python.org/doc

You'll need something like this:

> class my_top_block(gr.top_block):
>         def __init__(self):
>                gr.top_block.__init__(self)
> 
>                self.tx_path = transmit_path()
>                self.rx_path =  receive_path()
> 
>                self.connect(self.tx_path)
>                self.connect(self.rx_path)


Eric