https://dailypypy.org/tags/url/ Recent content in URL on 每日拍拍 Hugo -- gohugo.io zh-tw © 2026 每日拍拍 Tue, 27 Oct 2026 12:18:00 +0800 155076163427069952 154825760438254592 https://dailypypy.org/learn/streamlit-query-params-state-contracts/ Tue, 27 Oct 2026 12:18:00 +0800 https://dailypypy.org/learn/streamlit-query-params-state-contracts/ <!--- 1440x768 prompt: masterpiece, best quality, highres, clean anime illustration, japanese anime style, soft shading, flat color design, 1girl, black hair, green eyes, white off-shoulder shirt, black short skirt, high angle medium shot, standing with hands resting on hips, curious raised eyebrow and gentle closed-mouth smile, looking at viewer, pastel seafoam background, neat composition, detailed eyes, cute and smart vibe, minimal background, polished illustration, no text negative prompt: worst quality, bad eye, bad hand, extra limbs, manga, multiple views, monochrome, text, signature dedup note: Narrow follow-up to ../python-streamlit-advanced/, whose URL example owns only a single product parameter. This article owns typed public filter admission, repeated scalar rejection, canonical multivalue serialization, event-source precedence, reset and convergence. Unlike ../streamlit-apptest-pytest/, it tests a specific URL contract rather than surveying the testing API; no cache/multipage or custom-component tutorial is repeated. ---> <h2 class="relative group">一. 前言：你看到的篩選，不一定在分享連結裡 <div id="一-前言你看到的篩選不一定在分享連結裡" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 ltr:-left-6 rtl:-right-6 not-prose group-hover:opacity-100"> <a class="group-hover:text-primary-300 dark:group-hover:text-neutral-700" style="text-decoration-line: none !important;" href="#%e4%b8%80-%e5%89%8d%e8%a8%80%e4%bd%a0%e7%9c%8b%e5%88%b0%e7%9a%84%e7%af%a9%e9%81%b8%e4%b8%8d%e4%b8%80%e5%ae%9a%e5%9c%a8%e5%88%86%e4%ba%ab%e9%80%a3%e7%b5%90%e8%a3%a1" aria-label="定位點">#</a> </span> </h2> <p>「我把連結傳給你了，你怎麼看到全部資料？」</p> <p>拍拍君很熟悉這種場面：自己的 Dashboard 已選好地區和標籤， 同事打開連結卻回到預設畫面。因為 Widget 狀態活在 Session State， 不代表它也活在 URL。</p> <p>反過來，直接把 URL 每輪塞回 Widget，也可能讓剛剛的選擇被舊參數蓋掉。 今天不重做 Dashboard，而是替「可分享的篩選條件」訂一份小契約。</p> <p>如果還不熟 key 與 rerun，先看<a href="../python-streamlit-advanced/">Streamlit 進階篇</a>。 這次往下挖的是輸入邊界與同步順序，不是另一輪 cache 教學。</p>