With Chameleon >= 2.7.0 you can use the "load" TALES expression. Example:
main.pt:
<html>
<head>
<div metal:define-slot="head"></div>
</head>
<body>
<ul id="menu">
<li><a href="">Item 1</a></li>
<li><a href="">Item 2</a></li>
<li><a href="">Item 3</a></li>
</ul>
<div metal:define-slot="content"></div>
</body>
</html>
my_view.pt:
<html metal:use-macro="load: main.pt">
<div metal:fill-slot="content">
<p>Bonjour tout le monde.</p>
</div>
</html>
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…