old_contents: #!/usr/bin/env python3
  import logging
  import os
  import sys
  import Fake
  from faucet import faucet
  from ryu.controller import dpset
  from faucet import faucet_experimental_api
  
  logging.disable(logging.CRITICAL)
  
  # run faucet
  application = faucet.Faucet(dpset=dpset.DPSet(), faucet_experimental_api=faucet_experimental_api.FaucetExperimentalAPI())
  application.start()
  
  # make sure dps are running
  for dp_id, valve in list(application.valves.items()):
      valve.dp.running = True
  
  import afl
  while afl.loop(1000):
      # receive input from afl
      rcv = sys.stdin.read()
      data = None
      try:
          data = bytearray.fromhex(rcv)
      except (ValueError, TypeError):
          pass
  
      if data is not None:
          # create fake packet
          dp = Fake.Datapath(1)
          msg = Fake.Message(datapath=dp, cookie=1524372928, port=1, data=data, in_port=1)
          pkt = Fake.RyuEvent(msg)
  
          # send fake packet to faucet
          application.packet_in_handler(pkt)
  
  os._exit(0)
new_contents: #!/usr/bin/env python3
  
  """Run AFL repeatedly with externally supplied generated packet from STDIN."""
  
  import logging
  import sys
  from faucet import faucet
  from faucet import faucet_experimental_api
  from ryu.controller import dpset
  import afl
  import Fake
  
  
  logging.disable(logging.CRITICAL)
  
  
  def main():
      # run faucet
      application = faucet.Faucet(
          dpset=dpset.DPSet(),
          faucet_experimental_api=faucet_experimental_api.FaucetExperimentalAPI())
      application.start()
  
      # make sure dps are running
      for valve in list(application.valves_manager.valves.values()):
          valve.dp.running = True
  
      while afl.loop(1000):
          # receive input from afl
          rcv = sys.stdin.read()
          data = None
          try:
              data = bytearray.fromhex(rcv)
          except (ValueError, TypeError):
              continue
  
          # create fake packet
          dp = Fake.Datapath(1)
          msg = Fake.Message(datapath=dp, cookie=1524372928, port=1, data=data, in_port=1)
          pkt = Fake.RyuEvent(msg)
  
          # send fake packet to faucet
          application.packet_in_handler(pkt)
  
  
  if __name__ == "__main__":
      main()
  
subject: Improve pylint score for fuzz_packet.py.