If the expr attribute is present it is evaluated when the template is executed to generate the name of a template file. The specified template file is loaded and executed with the output replacing the <al-include> tag.
For example:
>>> open('other.html', 'w').write('name = "<al-value expr="name">"') >>> import albatross >>> ctx = albatross.SimpleContext('.') >>> ctx.locals.name = 'other.html' >>> albatross.Template(ctx, '<magic>', ''' ... Inserting <al-value expr="name">: <al-include expr="name"> here. ... ''').to_html(ctx) >>> ctx.flush_content() Inserting other.html: name = "other.html" here.