code: def str_of_length(n):
      return "".join(
          random.choices(string.ascii_uppercase + string.digits, k=n)
      )
  
imports: import json
  import os
  import random
  import string
  from google.protobuf.wrappers_pb2 import BoolValue, StringValue
  from wandb.proto import wandb_settings_pb2
  from wandb.sdk.internal.job_builder import JobBuilder
  from wandb.sdk.internal.settings_static import SettingsStatic
  from wandb.util import make_artifact_name_safe
label_desc: Use image node_id 1 for calling a global function with example usage: str_of_length(n) and returns: str