code: def start_http_server(redirect=None):
      """Returns the port of the newly started HTTP server."""
  
      # Start HTTP server to serve TAR files.
      # pylint:disable=g-import-not-at-top
      if sys.version_info[0] == 2:
          import BaseHTTPServer
          import SimpleHTTPServer
  
          class HTTPServerV6(BaseHTTPServer.HTTPServer):
              address_family = socket.AF_INET6
  
          class RedirectHandler(
              SimpleHTTPServer.SimpleHTTPRequestHandler
          ):
              def do_GET(self):
                  _do_redirect(self, redirect)
  
          server = HTTPServerV6(
              ("", 0),
              RedirectHandler
              if redirect
              else SimpleHTTPServer.SimpleHTTPRequestHandler,
          )
          server_port = server.server_port
      else:
          import http.server
          import socketserver
  
          class TCPServerV6(socketserver.TCPServer):
              address_family = socket.AF_INET6
  
          class RedirectHandler(http.server.SimpleHTTPRequestHandler):
              def do_GET(self):
                  _do_redirect(self, redirect)
  
          server = TCPServerV6(
              ("", 0),
              RedirectHandler
              if redirect
              else http.server.SimpleHTTPRequestHandler,
          )
          _, server_port, _, _ = server.server_address
      # pylint:disable=g-import-not-at-top
  
      thread = threading.Thread(target=server.serve_forever)
      thread.daemon = True
      thread.start()
  
      return server_port
  
imports: import os
  import socket
  import sys
  import threading
  from absl import flags
  import tensorflow
  from tensorflow_hub import resolver
label_desc: Use image node_id 4 for calling a global function with example usage: start_http_server(redirect) and returns: server_port