[Discuss-gnuradio] How to stor hexadecimal transmitted data in ./benchmark_tx

[Vaibhav Bhatnagar]

I would like to capture all packets, when it generates in the file
benchmark_tx.py at 2.4Ghz like this:

# generate and send packets
    nbytes = int(1e6 * options.megabytes)
    n = 0
    pktno = 0
    pkt_size = int(options.size)

    while n < nbytes:
        if options.from_file is None:
            data = (pkt_size - 2) * chr(pktno & 0xff)


<<<< here I would like to write this data in file and  concatenate>>>>>>

        payload = struct.pack('!H', pktno & 0xffff) + data
        send_pkt(payload)
        n += len(payload)
        sys.stderr.write('.')


I tried to write it like:
f=open('a','w')
f.write(data), but it doesn't work because, data is not one value it's a
sequence of specific size. I dig a bit more in python got no idea.

can somebody give me an idea how I can store these value so that I can
compare these data after capturing on receiving end by usrp_rx_cfile.py
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