code: def stat(filename, use_cache_only=False):
      
      filename = pyc2py(filename)
      if filename not in file_cache:
          if not use_cache_only: cache_file(filename)
          if filename not in file_cache:
              return None
          pass
      return file_cache[filename].stat
docs: Return stat() info for *filename*. If *use_cache_only* is *False*,
      we will try to fetch the file if it is not cached.