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<url><loc>https://read0nly.net/2026/10/21/python-membership-tests-list-scans-versus-set-lookups/</loc><news:news><news:publication><news:name>read0nly</news:name><news:language>en</news:language></news:publication><news:publication_date>2026-10-21T05:39:57+00:00</news:publication_date><news:title>Python membership tests: list scans versus set lookups</news:title><news:keywords>Python, data structures, CPython, Lists, Sets, Membership testing</news:keywords></news:news><image:image><image:loc>https://read0nly.net/wp-content/uploads/2026/10/read0nly-python-membership-20261021-v2.png?w=150</image:loc></image:image></url></urlset>
