code: def get_env(name):
      "Return env var value if it's defined and not an empty string, or return Unknown"
      res = os.environ.get(name,'')
      return res if len(res) else "Unknownf get_env(name):
      "Return env var value if it's defined and not an empty string, or return Unknown"
      res = os.environ.get(name,'')
      return res if len(res) else "Unknown"
docs: Return env var value if it's defined and not an empty string, or return Unknown