def _get_url(self):
        """
        get url with global lock
        """
        self.lock.acquire()
        if self.len_urls < self.url_index_offset:
            url = self.urls[self.url_index_offset]
        else:
            url = None, None, None
        self.url_index_offset += 1
        self.lock.release()
        return url
dataset/ETHPy150Open lijiejie/BBScan/BBScan.py/InfoDisScanner._get_url/swapped operands of `<`