'The page context.'

def context(self, data=None, extra=None):

    if (extra is None):
        extra = {}
    context = {'__CACTUS_CURRENT_PAGE__': self}
    (page_context, data) = self.parse_context((data or self.data()))
    context.update(self.site.context())
    context.update(extra)
    context.update(page_context)
    return Context(context)
