code: def find_files(directory, pattern):
      
      for root, __, files in os.walk(directory):
          for basename in files:
              if fnmatch.fnmatch(basename, pattern):
                  filename = os.path.join(root, basename)
                  yield filename
docs: Recusively finds files in a directory re
      :param directory: base directory
      :param pattern: wildcard pattern
      :return: generator with filenames matching pattern