code: def flatten(l):
      return [item for sublist in l for item in sublist]
  
imports: from hyperparameter_hunter.utils.boltons_utils import remap, default_enter
  from datetime import datetime
  from inspect import Traceback
  import re
  import string
  from typing import Any, Callable, Iterable, List, Tuple, Union
  import wrapt
label_desc: Use image node_id 3 for calling a global function with example usage: flatten(l) and returns: unknown