[Zope] including a dtml method through a variable

With reference to the usual dtml-var to include a dtml-method in another page. i.e. <dtml-var page_dtml_widget> How is it possible to do this dynamically? Lets say in some pyhton script i execute a line like this: if a: REQUEST.set("widget", "page_dtml_widget1") else: REQUEST.set("widget", "page_dtml_widget2") Later on in the dtml method, how can i use that variable for a dynamic include? <dtml-var widget>... ...Obviously doesnt work, it just prints out the value of the variable. After much head scratching i still cant get around this. Any suggestions anyone?