code: def __getitem__(self, key):
      return self._servers[key]
  
imports: import json
  import logging
  import math
  import os
  import socket
  import subprocess
  import sys
  import threading
  import time
  from werkzeug.exceptions import NotFound
  from werkzeug.utils import redirect
  from guild import serving_util
  from guild import util
  from guild import var
label_desc: Use image node_id 4 for calling the TBServers obj's underlying member method code with example usage: obj.__getitem__(key) and returns: self