array.fromstring and array.tostring deprecated, and alias for
array.frombytes and array.tobytes. Deprecated since version 3.2,
have been removed in version python 3.9.
Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Signed-off-by: Yunhua Feng <fengyunhua@byosoft.com.cn>
553bda4d8e