$def with ()
$var title: Site Owner

$ get = lambda property: tx.host.owner.get(property, [None])

<form method=post>
<div><label>Your address<br>
<input type=text readonly value="$tx.origin"></div>
<div><label>Name<br>
<input type=text name=name value="$get('name')[0]"></div>
<div><label>Photo<br>
<input type=text name=photo value="$get('photo')[0]"></div>
<div><label>Nickname<br>
<input type=text name=nickname value="$get('nickname')[0]"></div>
<div><label>Note<br>
<input type=text name=note value="$get('note')[0]"></div>
<button>Update</button>
</form>