code: def copy_files(src, ext, dst):
      
      src_path = os.path.join(os.path.dirname(__file__), src)
      dst_path = os.path.join(os.path.dirname(__file__), dst)
      file_list = os.listdir(src_path)
      for f in file_list:
          if f == '__init__.py':
              continue
          f_path = os.path.join(src_path, f)
          if os.path.isfile(f_path) and f.endswith(ext):
              shutil.copy(f_path, dst_path)
docs: Copies files with extensions "ext" from "src" to "dst" directory.