code: def _full_host(host, user):
      if user:
          return f"{user}@{host}"
      return host
  
file_path: guildai/guild/remotes/ssh_util.py
imports: import logging
  import subprocess
  from guild import remote
label_desc: Use image node_id 2 for calling a global function with example usage: _full_host(host, user) and returns: host, user, str, host