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 "Unknown"
  
imports: from __future__ import annotations
  from .imports import *
  from .data.all import *
  from .optimizer import *
  from .learner import *
  from .callback.core import *
  from torch.utils.data import TensorDataset
  from torch.utils.data import TensorDataset
label_desc: Use image node_id 3 for calling a global function with example usage: get_env(name) and returns: unknown