局部钩子和全局钩子

    def clean(self):
        password = self.cleaned_data.get(‘password‘, ‘‘)
        re_password = self.cleaned_data.get(‘re_password‘)
        if password == re_password:
            md5 = hashlib.md5()
            md5.update(password.encode(‘utf-8‘))
            self.cleaned_data[‘password‘] = md5.hexdigest()
            return self.cleaned_data
        else:
            self.add_error(‘re_password‘, ‘两次密码不一致‘)
            raise ValidationError(‘两次密码不一致‘)