def search(self, regex):
        try:
            spec = {'$or': [{'data.content'    : {'$regex': regex, '$options': 'im'}},
                            {'data.description': {'$regex': regex, '$options': 'im'}}]}
            fields = {'_id': 0}
            cur = self.db.docs.find(spec, fields)
        except Exception as e:
            raise DatabaseException(e)
        return [Document(**row) for row in cur]
def _split_horizontal(container):
		r1 = None
		r2 = None
		min_h = int(H_RATIO*container.w)+1
		if container.h < 2*min_h:
			return None
		r1 = Container(container.x,container.y,container.w,randint(min_h, container.h-min_h))
		r2 = Container(container.x,container.y+r1.h,container.w,container.h-r1.h)
		return [r1, r2]