How to call DMSMyCuff.HASH? when inserting CROB into Oracle with Python

How can this be done in one operation instead of two?

< H1 >! / usr/local/bin/python3 < / H1 >

import cx_Oracle

con = cx_Oracle.connect ("scott/tiger@localhost:1512/ORCLPDB1", encoding= "UTF-8")
cursor = con.cursor ()
cursor.execute ("CREATE TABLE t (id NUMBER, script CLOB, script_hash RAW (32)")

my_text ="$" 2 * 10

statement = "INSERT INTO t (id, script) VALUES (: my_id,: my_clob)"
cursor.execute (statement, (1, my_text)

statement = "

UPDATE t 
   SET script_hash = DBMS_CRYPTO.HASH(script, 2) 
 WHERE id = :my_id"""

cursor.execute (statement, {"my_id": 1})

con.commit ()
con.close ()

This doesn"t work:

statement = "
INSERT INTO t (id, script, script_hash)
VALUES (: my_id,: my_clob, DBMS_CRYPTO.HASH (: my_clob, 2))
cursor.execute (statement, (2, my_text, my_text)

< H1 > cx_Oracle.DatabaseError: ORA-01465: invalid hex number < / H1 >

(Oracle 12.2 using Python and cx_Oracle 6.3)