utils.py 文件源码

def set_file_utime(filename, desired_time):
    """
    Set the utime of a file, and if it fails, raise a more explicit error.

    :param filename: the file to modify
    :param desired_time: the epoch timestamp to set for atime and mtime.
    :raises: SetFileUtimeError: if you do not have permission (errno 1)
    :raises: OSError: for all errors other than errno 1
    """
    try:
        os.utime(filename, (desired_time, desired_time))
    except OSError as e:
        # Only raise a more explicit exception when it is a permission issue.
        if e.errno != errno.EPERM:
            raise e
        raise SetFileUtimeError(
            ("The file was downloaded, but attempting to modify the "
             "utime of the file failed. Is the file owned by another user?"))