Hi, all. Still, I can not execute python script. There is a function called push (see testflow.py below). I placed command pusher.set(flow1) inside a push function. From the kamailio I want to execute this "push" function( python_exec("push");). However, it does not work. Though when I delete push function, leaving just pusher.set(flow) commands, the script is executed when I run kamailio. But I do not want to run the script with Kamailio during initialization process.   Any ideas about this issue?  Kamailio configs: modparam("app_python", "script_name", "/usr/local/etc/sip-router/testflow.py") modparam("app_python", "mod_init_function", "mod_init") modparam("app_python", "child_init_method", "child_init") +++++++++++++++++++++++++++++++++++++ testflow.py file: +++++++++++++++++++++++++++++++++++++ #! /usr/bin/python import sys import httplib import json class test(object): def __init__(self, server): self.server = server def child_init(self, y): return 0 def get(self, data): ret = self.rest_call({}, 'GET') return json.loads(ret[2]) def set(self, data): ret = self.rest_call(data, 'POST') return ret[0] == 200 def remove(self, objtype, data): ret = self.rest_call(data, 'DELETE') return ret[0] == 200 def installflowone(): call(["./installflows.sh"]) def rest_call(self, data, action): path = '/wm/staticflowentrypusher/json' headers = { 'Content-type': 'application/json', 'Accept': 'application/json', } body = json.dumps(data) conn = httplib.HTTPConnection(self.server, 8080) conn.request(action, path, body, headers) response = conn.getresponse() ret = (response.status, response.reason, response.read()) print ret conn.close() return ret pusher = test('10.0.0.10') flow1 = { 'switch':"00:00:08:00:27:62:77:1d", "name":"flow-mod-1", "cookie":"0", "priority":"32000", "ingress-port":"3", "active":"true", "actions":"output=4" } flow2 = { 'switch':"00:00:08:00:27:62:77:1d", "name":"flow-mod-2", "cookie":"0", "priority":"30000", "ingress-port":"4", "active":"true", "actions":"output=3" } def push(self):       pusher.set(flow1)       pusher.set(flow2) def mod_init(): return test(object) +++++++++++++++++++++++++++++++++++++++++++++ Best Regards, Azamat Ailbayev Mob.: +49 (0) 15215023005