Do the script open a connection and then not closing it proper so i need to wait for some timeout?

Script:

#!/usr/bin/python
#
# 2015-07-29 - EspenGB - Working 1.2.17
# Usage:
# $0 hostname
# * Ex: $0 node.netxms.tld

# $0 hostfile(/etc/hostname)
# * Ex: $0 /etc/hosts

# $0 hostname/hostfile containerId
# * Ex: $0 /etc/hosts 1234

import sys, socket, os, string, re

if len(sys.argv) < 2:
    print >>sys.stderr, 'Usage: ' + sys.argv[0] + ' <file/host> [<containerId>]'
    sys.exit(1)

name = sys.argv[1]

def addNode(name):
    try:
        test = socket.inet_aton(name)
        host_ip = name
    except socket.error:
        try:
            host_ip = socket.gethostbyname(name)
        except socket.error:
            host_ip = "0.0.0.0"

    if sys.argv[2]:
	containerId = int(sys.argv[2])
    else:
        if sys.argv[0] == "nxshell_test":
            containerId = int(5636)
        else:
            containerId = int(5636)
    flags = NXCObjectCreationData.CF_DISABLE_NXCP | \
            NXCObjectCreationData.CF_DISABLE_SNMP

    cd = NXCObjectCreationData(objects.GenericObject.OBJECT_NODE, name, containerId);
    cd.setCreationFlags(flags);
    cd.setPrimaryName(host_ip) # Create node with IP address
    nodeId = session.createObject(cd)
    print " * Added {0} to containerID: {1}".format(name, containerId)

def is_valid_ip(ip):
    m = re.match(r"^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$", ip)
    return bool(m) and all(map(lambda n: 0 <= int(n) <= 255, m.groups()))

if os.path.isfile(name):
    print "File found: "
    for names in open(name).readlines():
	hostnames = re.split(r'\s+', names)
	host_ip = hostnames[0].strip()
	host_name = hostnames[1].strip()
	if is_valid_ip(host_ip):
	    print "Add: '" + host_ip + "' '" + host_name + "'"
            addNode(host_name.strip());
else:
    print "Add: " + name.strip()
    addNode(name.strip());