Web.py Cookbook 简体中文版 - 交替风格

问题:

你想通过数据集合动态的生成交替背景色的列表.

方法:

Give templetor access to the

int

built-in and use modulo to test.

code.py

web.template.Template.globals['int'] = int

template.html

<ul>
$var i: 0
$for track in tracks:
$var i: ${int(self.i) + 1}
<li class="    $if int(self.i) % 2:        odd    $else:        even    ">$track.title</li>
</ul>

New Templetor

In the new implementation of templetor (which will be the default when version .3 is released), within any template loop you have access to a $loop variable. This works like so:

<ul>
$for foo in foos:
<li class="$loop.parity">
$foo
</li>
</ul>