Generating RSS feed based on existing `sitemap.xml`

rss-feed-generator.py

import xml.etree.ElementTree as ET
import PyRSS2Gen as rss
import datetime

# Parse the sitemap.xml
tree = ET.parse("book/sitemap.xml")
root = tree.getroot()

# Define the RSS feed basic info
rss_feed = rss.RSS2(
    title="Data Engineering Design Patterns (DEDP)",
    link="https://www.dedp.online",
    description="Data Engineering Design Patterns Book: Mastering Convergent Evolution",
    lastBuildDate=datetime.datetime.now(),
    items=[],
)

# Extract URLs and their metadata
for url in root.findall("{http://www.sitemaps.org/schemas/sitemap/0.9}url"):
    loc = url.find("{http://www.sitemaps.org/schemas/sitemap/0.9}loc").text
    if loc.endswith("/"):
        loc = loc[:-1]  # Remove the trailing slash
    loc += ".html"  # Append .html

    lastmod = url.find("{http://www.sitemaps.org/schemas/sitemap/0.9}lastmod").text
    lastmod_date = datetime.datetime.strptime(lastmod, "%Y-%m-%dT%H:%M:%S.%fZ")

    # Add item to the RSS feed
    rss_feed.items.append(
        rss.RSSItem(
            title=loc.split("/")[-1],
            link=loc,
            description=f"Updated on {lastmod}",
            pubDate=lastmod_date,
        )
    )

# Generate the RSS feed
rss_feed.write_xml(open("book/feed.xml", "w"))