code: def f3():
      return f2() + 1
  
file_path: dask/dask/tests/test_traceback.py
imports: from __future__ import annotations
  import traceback
  from contextlib import contextmanager
  import pytest
  import dask
  from dask.utils import shorten_traceback
label_desc: Use image node_id 4 for calling a global function with example usage: f3() and returns: unknown