rss2mm.py

import feedparser
from datetime import datetime
dt_fmt = "%a, %d %b %Y %H:%M:%S %Z"


def rss2mm(feed_url, until, max_n=3):
    ret_lines = []

    f = feedparser.parse(feed_url)
    for idx, e in enumerate(f["entries"]):
        dt = datetime.strptime(e["published"], dt_fmt)
        if dt < until or idx >= max_n:
            break
        ret_lines.append("##### [{}]({})".format(e["title"], e["link"]))
        ret_lines.append("```")
        ret_lines += list(filter(lambda x: x != "", e["summary"].split("\n")))[:3]
        ret_lines.append("```")
        ret_lines.append("")

    return "\n".join(ret_lines)


if __name__ == "__main__":
    until = datetime(2021, 8, 10)
    print("# POSTD")
    print(rss2mm("https://postd.cc/feed", until))
    print("# Zenn")
    print(rss2mm("https://zenn.dev/feed", until))