"""preprocessing functions, used with the 'preprocessor' argument on Template, TemplateLookup""" import re def convert_comments(text): """preprocess old style comments. example: from mako.ext.preprocessors import convert_comments t = Template(..., preprocessor=preprocess_comments)""" return re.sub(r'(?<=\n)\s*#[^#]', "##", text) # TODO def create_tag(callable): """given a callable, extract the *args and **kwargs, and produce a preprocessor that will parse for <% > and convert to an appropriate <%call> statement. this allows any custom tag to be created which looks like a pure Mako-style tag.""" raise NotImplementedError("Future functionality....")