Temporarily save result to call it later

Question

My Kodi addon's (using Python 2.7 and XML files) regex:

<item>
<title>Hello</title>
<link>http://helloworld.com/something.m3u8/$doregex[time]</link>

<regex>
    <name>time</name>
    <expres><![CDATA[(?m)\.js\?time=([0-9]+)]]></expres>
    <page>https://example.com/embed/3GhdKDSh/</page>
    <referer>https://example.com/embed/3GhdKDSh/</referer>
    <agent>Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:105.0) Gecko/20100101 Firefox/105.0</agent>
    <cookieJar><cookieJar>
</regex>

I get time from "example.com/embed/3GhdKDSh" in real-time. But I want to temporarily save my regex result (value 1662868347) to call it later for the final results:

saved.time = $doregex[time] // 1662868347

<item>
    <title>Hello</title>
    <link>http://helloworld.com/something.m3u8/saved.time</link>
</item>

How to do that? Some people use <expres>$pyFunction:</express>. Is this an idea?