you can match a string by repeatedly taking derivatives for each character. when you’ve consumed the entire input, you check if the resulting regex accepts the empty string (is “nullable”). if yes, the original string matched.
6 hours agoShareSave
，这一点在下载安装汽水音乐中也有详细论述
Code dump for 2.16
reader = maxminddb.open_database('ip66.mmdb')