':calls: `GET /repos/:owner/:repo/stats/code_frequency <http://developer.github.com/v3/repos/statistics/#get-the-number-of-additions-and-deletions-per-week>`_
:rtype: None or list of :class:`github.StatsCodeFrequency.StatsCodeFrequency`'

def get_stats_code_frequency(self):

    (headers, data) = self._requester.requestJsonAndCheck('GET', (self.url + '/stats/code_frequency'))
    if (data == {}):
        return None
    else:
        return [github.StatsCodeFrequency.StatsCodeFrequency(self._requester, headers, attributes, completed=True) for attributes in data]
