是否可以在web.py的模板中具有可选参数

Question

Is it possible to have optional parameters in templates in web.py. Suppose you want to pass error messages only if an error has occured, how would you go about doing it ??

Answer 1

Templetor, the web.py template system is just Python code embedded in HTML files (with a couple limitations), so yes, you can pass optional parameters using *args and **kwargs , for example:

$def with(**kwargs)
$if kwargs['error']:
    <p class=error>$kwargs['error']</p>