code: def _find_requirements_txt():
      requirement_files = []
      for dirpath, dirnames, filenames in os.walk("nni"):
          if "requirements.txt" in filenames:
              requirement_files.append(
                  os.path.join(
                      dirpath[len("nni/") :], "requirements.txt"
                  )
              )
      return requirement_files
  
imports: from distutils.cmd import Command
  from distutils.command.build import build
  from distutils.command.clean import clean
  import glob
  import os
  import shutil
  import sys
  import setuptools
  from setuptools.command.develop import develop
  import setup_ts
label_desc: Use image node_id 4 for calling a global function with example usage: _find_requirements_txt() and returns: requirement_files