code: def main():
      parser = argparse.ArgumentParser()
      parser.add_argument(
          "--host",
          type=str,
          default="localhost",
          help="Address or hostname to listen on",
      )
      parser.add_argument(
          "--port",
          type=int,
          default=5005,
          help="Port number to listen on",
      )
      parser.add_argument(
          "--tls",
          nargs=2,
          default=None,
          metavar=("CERTFILE", "KEYFILE"),
          help="Enable transport-level security",
      )
      parser.add_argument(
          "--verify_client",
          type=bool,
          default=False,
          help="enable mutual TLS and verify the client if True",
      )
  
      args = parser.parse_args()
      tls_certificates = []
      scheme = "grpc+tcp"
      if args.tls:
          scheme = "grpc+tls"
          with open(args.tls[0], "rb") as cert_file:
              tls_cert_chain = cert_file.read()
          with open(args.tls[1], "rb") as key_file:
              tls_private_key = key_file.read()
          tls_certificates.append((tls_cert_chain, tls_private_key))
  
      location = "{}://{}:{}".format(scheme, args.host, args.port)
  
      server = FlightServer(
          args.host,
          location,
          tls_certificates=tls_certificates,
          verify_client=args.verify_client,
      )
      print("Serving on", location)
      server.serve()
  
file_path: arrow/python/examples/flight/server.py
imports: import argparse
  import ast
  import threading
  import time
  import pyarrow
  import pyarrow.flight
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types