def get_cache_file(self, page_range_key, mode):
        try:
            return zipfile.ZipFile(self.directory+self.get_cache_filename(page_range_key)%".zip", mode)
        except IOError:
            return None
dataset/ETHPy150Open jcushman/pdfquery/pdfquery/cache.py/FileCache.get_cache_file/operator `+` -> `%`