test_os.py 文件源码

def supports_extended_attributes():
    if not hasattr(os, "setxattr"):
        return False
    try:
        with open(support.TESTFN, "wb") as fp:
            try:
                os.setxattr(fp.fileno(), b"user.test", b"")
            except OSError:
                return False
    finally:
        support.unlink(support.TESTFN)
    # Kernels < 2.6.39 don't respect setxattr flags.
    kernel_version = platform.release()
    m = re.match("2.6.(\d{1,2})", kernel_version)
    return m is None or int(m.group(1)) >= 39