code: def start_smart_module_server(download_url):
      """Serve documentation and module requests at the same URL."""
      # pylint:disable=g-import-not-at-top
      if sys.version_info[0] == 2:
          import BaseHTTPServer
          import SimpleHTTPServer
          import urlparse
  
          class HTTPServerV6(BaseHTTPServer.HTTPServer):
              address_family = socket.AF_INET6
  
          class RequestHandler(
              SimpleHTTPServer.SimpleHTTPRequestHandler
          ):
              def do_GET(self):
                  parsed_url = urlparse.urlparse(self.path)
                  qs = urlparse.parse_qs(parsed_url.query)
                  if qs["tf-hub-format"][0] == "compressed":
                      _do_redirect(self, download_url)
                  else:
                      _do_documentation(self)
  
          server = HTTPServerV6(("", 0), RequestHandler)
          server_port = server.server_port
      else:
          import http.server
          import socketserver
          import urllib
  
          class TCPServerV6(socketserver.TCPServer):
              address_family = socket.AF_INET6
  
          class RequestHandler(http.server.SimpleHTTPRequestHandler):
              def do_GET(self):
                  parsed_url = urllib.parse.urlparse(self.path)
                  qs = urllib.parse.parse_qs(parsed_url.query)
                  if qs["tf-hub-format"][0] == "compressed":
                      _do_redirect(self, download_url)
                  else:
                      _do_documentation(self)
  
          server = TCPServerV6(("", 0), RequestHandler)
          _, 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 3 for calling a global function with example usage: start_smart_module_server(download_url) and returns: server_port