code: def _iter_test_files():
      for path in glob.glob("guild/tests/*.md"):
          yield path
      for path in glob.glob("guild/tests/uat/*.md"):
          yield path
  
file_path: guildai/tools.py
imports: import argparse
  import doctest
  import glob
  import os
  import subprocess
  import sys
  import tempfile
label_desc: Use image node_id 4 for calling a global function with example usage: _iter_test_files() without return types