How to use OUT/INPUT params in callproc() ?

[liaosnet]

I'm try to call proc with OUT/INPUT params like test_146_CallSPINAndOUTParams.py, but it's not work.
here is my procedure and script

-- procedure match_animal with INOUT and OUT params
CREATE PROCEDURE match_animal(first_name VARCHAR(128), INOUT second_name VARCHAR(128), OUT animal_weight DOUBLE PRECISION )
  DEFINE match_name INT;
  LET match_name = 0;
  LET second_name = 'TRUE';
  LET animal_weight = 10;
END PROCEDURE;

#!/usr/bin/env python3

import sys
import IfxPy

print("Python IfxPy.callproc() start.\n")
connectStr="PROTOCOL=onsoctcp;HOST=192.168.80.70;SERV=9088;PROT=onsoctcp;SRVR=ids1410;DB=testdb;UID=informix;PWD=informix;DLOC=zh_CN.ut
f8;CLOC=zh_CN.utf8"
conn=IfxPy.connect(connectStr, "", "")

if conn:
    name = "Peaches"
    second_name = "Rickety Ride"
    weight = 0

    print("Values of bound parameters _before_ CALL:")
    print("  1: %s 2: %s 3: %d\n" % (name, second_name, weight))

    stmt, name, second_name, weight = IfxPy.callproc(conn, 'match_animal', (name, second_name, weight))

    if stmt is not None:
        print("Values of bound parameters _after_ CALL:")
        print("  1: %s 2: %s 3: %d\n" % (name, second_name, weight))

IfxPy.close(conn)

print("\nPython IfxPy.callproc() finish.")
sys.exit(0)

run it with "python3 T2.py", the output:

Python IfxPy.callproc() start.

Values of bound parameters _before_ CALL:
  1: Peaches 2: Rickety Ride 3: 0

Traceback (most recent call last):
  File "T2.py", line 18, in <module>
    stmt, name, second_name, weight = IfxPy.callproc(conn, 'match_animal', (name, second_name, weight))
Exception: [OneDB][OneDB ODBC Driver][OneDB]Argument must be a Statement Local Variable or SPL variable or argument for an SQLCODE=-9752