code: def get_metis_source():
      metis_dir = os.path.join("pgl", "third_party", "metis")
      if sys.platform == "win32":
          return glob.glob(os.path.join(metis_dir, "*.c")) + glob.glob(
              os.path.join(metis_dir, "win32", "*.c")
          )
      else:
          return (
              glob.glob(os.path.join(metis_dir, "GKlib", "*.c"))
              + glob.glob(os.path.join(metis_dir, "*.c"))
              + glob.glob(os.path.join(metis_dir, "libmetis", "*.c"))
          )
  
file_path: PGL/setup.py
imports: import os
  import sys
  import re
  import codecs
  import glob
  from setuptools import setup, find_packages
  from setuptools import Extension
  from setuptools import dist
  from setuptools.command.build_ext import build_ext
label_desc: Use image node_id 3 for calling a global function with example usage: get_metis_source() and returns: unknown, unknown