def get_stats_punch_card(self):
headers, data = self._requester.requestJsonAndCheck(<EOL>"<STR_LIT:GET>",<EOL>self.url + "<STR_LIT>"<EOL>)<EOL>if not data:<EOL><INDENT>return None<EOL><DEDENT>else:<EOL><INDENT>return github.StatsPunchCard.StatsPunchCard(self._requester, headers, data, completed=True)<EOL><DEDENT>
:calls: `GET /repos/:owner/:repo/stats/punch_card <http://developer.github.com/v3/repos/statistics/#get-the-number-of-commits-per-hour-in-each-day>`_
:rtype: None or :class:`github.StatsPunchCard.StatsPunchCard`