code: def do_put(self, context, descriptor, reader, writer):
      key = FlightServer.descriptor_to_key(descriptor)
      print(key)
      self.flights[key] = reader.read_all()
      print(self.flights[key])
  
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 6 for calling the FlightServer obj's underlying member method code with example usage: obj.do_put(context, descriptor, reader, writer) without return types