[Zope] Using regexes in DTML expressions

I'd like to be able to use a regex from the Python re module in a <dtml-if> tag expression, e.g. <dtml-if "_.re.search('(([Ps|Sc|S|C][i|y])|Sigh)Comp?', company_name)"> Pickled pink. </dtml-if> What is the easiest way to do something like this? Thanks, Ben