forms.py 文件源码

def reset_captcha(self):
        """Generate new question and valid token for it, reset previous answer
        if any.
        """
        q, a = self._generate_captcha()
        expires = time.time() + \
            getattr(settings, 'CAPTCHA_EXPIRES_SECONDS', 60*60)
        token = self._make_token(q, a, expires)
        self.initial['captcha_token'] = token
        self._plain_question = q
        # reset captcha fields for bound form
        if self.data:
            def _reset():
                self.data['captcha_token'] = token
                self.data['captcha_answer'] = ''
            if hasattr(self.data, '_mutable') and not self.data._mutable:
                self.data._mutable = True
                _reset()
                self.data._mutable = False
            else:
                _reset()

        self.fields['captcha_answer'].label = mark_safe(self.knotty_question)