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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _create_new(self, request):
 """Creates the new wiki page that houses the details of the unit testing runs. """

        self.prefix = "{}_Pull_Request_{}".format(request.repo.name, request.pull.number)
        head = list(self._newpage_head)
        head.append(request.repo.testing.wiki(False))
        if not self.testmode:
            page = self.site.Pages[self.newpage]
            result = page.save('\n'.join(head), summary='Created by CI bot for unit test details.', bot=True)
            return result[u'result'] == u'Success'
        else:
            return '\n'.join(head)