def _default_headers(self):
self.session.headers.update(<EOL>{<EOL>'<STR_LIT>': '<STR_LIT:application/json>',<EOL>'<STR_LIT>': '<STR_LIT>' % ('<STR_LIT>', __version__)<EOL>}<EOL>)<EOL>
Update default headers.

        The requests library default headers are set in the `utils.py`
        `default_headers()` function.