mongo_objectid_to_uuid1.py

def make_id(mongo_id: ObjectId, date=None, iteration=0):
    target_date = date or mongo_id.generation_time.replace(tzinfo=None)
    hasher = hashlib.sha1()
    hasher.update(mongo_id.binary)
    hasher.update(str(iteration).encode())
    hash = hasher.digest()

    time = int((target_date - datetime(1582, 10, 15)).total_seconds() * 10000000)
    time_low = time & 0xffffffff
    time_mid = (time >> 32) & 0xffff
    time_high = ((time >> 48) & 0x0fff) | 0x1000
    clock_seq_hi_variant = hash[0]
    # set variant to RFC 4122
    clock_seq_hi_variant &= ~0xc0
    clock_seq_hi_variant |= 0x80
    clock_seq_low = hash[1]
    node = int.from_bytes(hash[2:8], byteorder='big')
    return uuid.UUID(fields=(time_low, time_mid, time_high, clock_seq_hi_variant, clock_seq_low, node))