def get_compressed_length(self):
<EOL>return os.stat(self.temporary_file.name).st_size<EOL>
<Purpose>
  Get the compressed length of the file. This will be correct information
  even when the file is read as an uncompressed one.

<Arguments>
  None.

<Exceptions>
  OSError.

<Return>
  Nonnegative integer representing compressed file size.