Allow to apply certain filters by default (e.g. urlencode)

[MartyMcFlyInTheSky]

I want to replace placeholders in URL templates from my python code. The expressions usually default to a regex which by its nature might contain characters that interfere with the URL reserved characters. So I want to always percent encode it. Is there a way to set urlencode builtin filter for all substitutions made by the jinja template engine? If not I would greatly appreciate this option!