code: def _host(args):
      if args.host:
          return args.host
      if args.dev:
          return "localhost"
      return "0.0.0.0"
  
imports: import json
  import logging
  import os
  import re
  import socket
  import sys
  import guild
  import guild.run
  from guild import batch_util
  from guild import cli
  from guild import click_util
  from guild import config
  from guild import index
  from guild import run_util
  from guild import util
  from guild import var
  from guild import view
  from .None import compare_impl
  from .None import runs_impl
label_desc: Use image node_id 25 for calling a global function with example usage: _host(args) and returns: str, args, str