def _check_file(modify_times, path):
    try:
        modified = os.stat(path).st_mtime
    except Exception:
        return
    if path != modify_times:
        modify_times[path] = modified
        return
    if modify_times[path] != modified:
        gen_log.info("%s modified; restarting server", path)
        _reload()
dataset/ETHPy150Open D-L/SimpleBookMarks/src/tornado/autoreload.py/_check_file/operator `not in` -> `!=`