his headline">¶</a></h3>
<p>A flip-side to def within def is a def call with content. This
is where you call a def, and at the same time declare a block of
content (or multiple blocks) that can be used by the def being
called. The main point of such a call is to create custom,
nestable tags, just like any other template language’s
custom-tag creation system – where the external tag controls the
execution of the nested tags and can communicate state to them.
Only with Mako, you don’t have to use any e