code: def glob_tree(roots, patterns, exclude_patterns=None):
      
  
      if not exclude_patterns:
          exclude_patterns = []
  
      result = glob(roots, patterns, exclude_patterns)
      subdirs = [s for s in glob(roots, ["*"], exclude_patterns) if s != "." and s != ".." and os.path.isdir(s)]
      if subdirs:
          result.extend(glob_tree(subdirs, patterns, exclude_patterns))
  
      return result
docs: Recursive version of GLOB. Builds the glob of files while
      also searching in the subdirectories of the given roots. An
      optional set of exclusion patterns will filter out the
      matching entries from the result. The exclusions also apply
      to the subdirectory scanning, such that directories that
      match the exclusion patterns will not be searched.