code: def get_version_number(default):
      # The `or default` is because on CI the `getenv` can return the empty string.
      version = os.getenv("LCE_RELEASE_VERSION", default) or default
      if "." not in version:
          raise ValueError(f"Invalid version: {version}")
      return version
  
file_path: compute-engine/setup.py
imports: import os
  from sys import platform
  from setuptools import Extension, dist, find_packages, setup
label_desc: Use image node_id 2 for calling a global function with example usage: get_version_number(default) and returns: version