serialize.py 文件源码

def load(pickle_file):
    """output: is_exist, value"""
    try:
        pickle_fd = open(pickle_file, "r")
    except IOError as err:
        if errno.ENOENT == err.errno:
            debug("cache file does not exist: %s" % pickle_file)
            return False, None
        assert False
    try:
        value = cPickle.load(pickle_fd)
        return True, value
    except (ValueError, UnpicklingError, EOFError):
        error("cannot read pickle file: %s, suggest re-fetch the pickle file" % pickle_file)
        assert False