Django - 不支持的格式字符'a'（0x61）

Question

我收到以下错误

unsupported format character 'a' (0x61) at index 16

def send_notification_email(sender, **kwargs):
    change = sender
    print "=========================================="
    mail_admins(subject="model %(model) has been changed by %(user)" % 
                            {'model':change.content_type, 'user': change.user},
                message = render_to_string('change_email.html', { 'change': change }) )

有什么建议吗？

Answer 1

您忘记了格式说明符。

%(model)s