Send_packet python file name?

Hi,

I am trying to send a file from GRC.I am successful in doing that.Now,i
need
to know through which python file are the packets being sent.

I saw a send_pkt function in pkt.py but when i put some print statements
in
that function,those statements don’t show up when i run the file.With
which
i concluded that the function send_pkt from pkt.py has not been called.

can you please help me in finding from where the packets are being sent.

Thanks.

The file is under /grc-gnuradio/blks2/packet.py