Python example implementing an Automatic Repeat reQuest (ARQ) technique

Hello everyone,
Can someone tell me if there is some python example in the directory
gnuradio-example where is implemented an Automatic Repeat reQuest (ARQ)
technique? I’m trying to modify the benchmark_tx.py and benchmark_rx.py
files but this does not seem the faster and easier way to do thet! Thank
you
in advance.
Best Regards.

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