code: def _random_key(key_length: int = 3) -> str:
      return "".join(
          random.choice(string.ascii_letters).upper()
          for _ in range(key_length)
      )
  
file_path: neptune-client/tests/unit/neptune/new/utils/api_experiments_factory.py
imports: import random
  import string
  import uuid
  from random import randint
  from neptune.internal.backends.api_model import ApiExperiment
  from neptune.internal.container_type import ContainerType
  from neptune.internal.id_formats import SysId, UniqueId
label_desc: Use image node_id 7 for calling a global function with example usage: _random_key(key_length) and returns: str