pack and unpack octects from snmp oids in python

snmp_date_pack_and_unpack_example.py

import struct
import datetime 
ts = 1620386580.0
dt = datetime.datetime.fromtimestamp(ts)
packed = struct.pack(">hbbbbbb", dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second, dt.microsecond)
print ("packed", packed, ts )
tp = dt.timetuple() # expand values in a tuple

import time

unpacked = struct.unpack('>hbbbbbb', packed)
dt = datetime.datetime(*unpacked)
ts = time.mktime(dt.timetuple()) + (dt.microsecond / 1000000.0)
1620386580.0

Example from a huawei OLT response
How to 'decrypt' the date time values