To help with the first question that our fellow Anonymonk named: it tries to match the regex (first parameter) in the string (second parameter). .group(0) returns the matched string.
Differences between Python and Perl:
The python code then splits the found match to extract the part after value=. I would use a group instead, even in Python.
I would write for (qw(id param1 param2 sessId) {
$response_data =~ /name="$_" value="([A-Za-z0-9]*)" size=/;
$v[$_] = $1;
}
Although afterwards the values aren't in variables $id, $param1, etc but in $v["id"] etc, however this might come in handy anyway, because most probably the things you will be doing to each of them will be similiar, and you can do them by employing similiar loops.
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