code: def env_or_def(env, default):
      if env in os.environ:
          return os.environ[env]
      return default
  
imports: import sys, os
  from common import GptParams
  from low_level_api_chat_cpp import LLaMAInteract
label_desc: Use image node_id 1 for calling a global function with example usage: env_or_def(env, default) and returns: default, os