I'm trying to connect pos box with network printer. But when I run my code, I got this error.

raise RuntimeError("cannot set daemon status of active thread")

Anyone know how to fix this error?

python code

 import commands

import logging
import simplejson
import os
import os.path
import io
import base64
import openerp
import time
import random
import math
import md5
import openerp.addons.hw_proxy.controllers.main as hw_proxy
import pickle
import re
import subprocess
import traceback

try:
    from .. escpos import *
    from .. escpos.exceptions import *
    from .. escpos.printer import Usb
    from .. escpos.printer import Network
except ImportError:
    escpos = printer = None

from threading import Thread, Lock
from Queue import Queue, Empty

try:
    import usb.core
    import socket
except ImportError:
    usb = None
    socket = None

from PIL import Image

from openerp import http
from openerp.http import request
from openerp.tools.translate import _

_logger = logging.getLogger(__name__)


class EscposDriver(Thread):
    def __init__(self):
        Thread.__init__(self)
        self.queue = Queue()
        self.lock  = Lock()
        self.status = {'status': 'connecting', 'messages':[]}

    def connected_network_devices(self):
        connected = '192.168.1.200'
        return connected

    def lockedstart(self):
        with self.lock:
            if not self.isAlive():
                self.daemon = True
                self.start()

    def get_escpos_printer(self):

        printers = self.connected_network_devices()
        if len(printers) > 0:
            print printers
            self.set_status('connected', 'Connected to'+printers)
            return Network(printers)
        else:
             self.set_status('disconnected', 'Printer Not Found')
             return None

    def get_status(self):
        self.push_task('status')
        return self.status

    def open_cashbox(self,printer):
        printer.cashdraw(2)
        printer.cashdraw(5)

    def set_status(self, status, message = None):
        _logger.info(status+' : '+ (message or 'no message'))
        if status == self.status['status']:
            if message != None and (len(self.status['messages']) == 0 or message != self.status['messages'][-1]):
                self.status['messages'].append(message)
        else:
            self.status['status'] = status
            if message:
                self.status['messages'] = [message]
            else:
                self.status['messages'] = []

        if status == 'error' and message:
            _logger.error('ESC/POS Error: '+message)
        elif status == 'disconnected' and message:
            _logger.warning('ESC/POS Device Disconnected: '+message)

    def run(self):

        if not escpos:
            _logger.error('ESC/POS cannot initialize, please verify system dependencies.')
            return
        while True:
            try:
                error = True
                timestamp, task, data = self.queue.get(True)

                printer = self.get_escpos_printer()

                if printer == None:
                    if task != 'status':
                        self.queue.put((timestamp,task,data))
                    error = False
                    time.sleep(5)
                    continue
                elif task == 'receipt':
                    if timestamp >= time.time() - 1 * 60 * 60:
                        self.print_receipt_body(printer,data)
                        printer.cut()
                elif task == 'xml_receipt':
                    if timestamp >= time.time() - 1 * 60 * 60:
                        printer.receipt(data)
                elif task == 'cashbox':
                    if timestamp >= time.time() - 12:
                        self.open_cashbox(printer)
                elif task == 'printstatus':
                    self.print_status(printer)
                elif task == 'status':
                    pass
                error = False

            except NoDeviceError as e:
                print "No device found %s" %str(e)
            except HandleDeviceError as e:
                print "Impossible to handle the device due to previous error %s" % str(e)
            except TicketNotPrinted as e:
                print "The ticket does not seems to have been fully printed %s" % str(e)
            except NoStatusError as e:
                print "Impossible to get the status of the printer %s" % str(e)
            except Exception as e:
                self.set_status('error', str(e))
                errmsg = str(e) + '\n' + '-'*60+'\n' + traceback.format_exc() + '-'*60 + '\n'
                _logger.error(errmsg);
            finally:
                if error:
                    self.queue.put((timestamp, task, data))
                if printer:
                    printer.close()

    def push_task(self,task, data = None):
        self.lockedstart()
        self.queue.put((time.time(),task,data))

    def print_status(self,eprint):
        localips = ['0.0.0.0','127.0.0.1','127.0.1.1','192.168.20.122']
        ips =  [ c.split(':')[1].split(' ')[0] for c in commands.getoutput("/sbin/ifconfig").split('\n') if 'inet addr' in c ]
        ips =  [ ip for ip in ips if ip not in localips ]
        eprint.text('\n\n')
        eprint.set(align='center',type='b',height=2,width=2)
        eprint.text('PosBox Status\n')
        eprint.text('\n')
        eprint.set(align='center')

        if len(ips) == 0:
            eprint.text('ERROR: Could not connect to LAN\n\nPlease check that the PosBox is correc-\ntly connected with a network cable,\n that the LAN is setup with DHCP, and\nthat network addresses are available')
        elif len(ips) == 1:
            eprint.text('IP Address:\n'+ips[0]+'\n')
        else:
            eprint.text('IP Addresses:\n')
            for ip in ips:
                eprint.text(ip+'\n')

        if len(ips) >= 1:
            eprint.text('\nHomepage:\nhttp://'+ips[0]+':8069\n')

        eprint.text('\n\n')
        eprint.cut()

    def print_receipt_body(self,eprint,receipt):

        def check(string):
            return string != True and bool(string) and string.strip()

        def price(amount):
            return ("{0:."+str(receipt['precision']['price'])+"f}").format(amount)

        def money(amount):
            return ("{0:."+str(receipt['precision']['money'])+"f}").format(amount)

        def quantity(amount):
            if math.floor(amount) != amount:
                return ("{0:."+str(receipt['precision']['quantity'])+"f}").format(amount)
            else:
                return str(amount)

        def printline(left, right='', width=40, ratio=0.5, indent=0):
            lwidth = int(width * ratio)
            rwidth = width - lwidth
            lwidth = lwidth - indent

            left = left[:lwidth]
            if len(left) != lwidth:
                left = left + ' ' * (lwidth - len(left))

            right = right[-rwidth:]
            if len(right) != rwidth:
                right = ' ' * (rwidth - len(right)) + right

            return ' ' * indent + left + right + '\n'

        def print_taxes():
            taxes = receipt['tax_details']
            for tax in taxes:
                eprint.text(printline(tax['tax']['name'],price(tax['amount']), width=40,ratio=0.6))

        # Receipt Header
        if receipt['company']['logo']:
            eprint.set(align='center')
            eprint.print_base64_image(receipt['company']['logo'])
            eprint.text('\n')
        else:
            eprint.set(align='center',type='b',height=2,width=2)
            eprint.text(receipt['company']['name'] + '\n')

        eprint.set(align='center',type='b')
        if check(receipt['company']['contact_address']):
            eprint.text(receipt['company']['contact_address'] + '\n')
        if check(receipt['company']['phone']):
            eprint.text('Tel:' + receipt['company']['phone'] + '\n')
        if check(receipt['company']['vat']):
            eprint.text('VAT:' + receipt['company']['vat'] + '\n')
        if check(receipt['company']['email']):
            eprint.text(receipt['company']['email'] + '\n')
        if check(receipt['company']['website']):
            eprint.text(receipt['company']['website'] + '\n')
        if check(receipt['header']):
            eprint.text(receipt['header']+'\n')
        if check(receipt['cashier']):
            eprint.text('-'*32+'\n')
            eprint.text('Served by '+receipt['cashier']+'\n')

        # Orderlines
        eprint.text('\n\n')
        eprint.set(align='center')
        for line in receipt['orderlines']:
            pricestr = price(line['price_display'])
            if line['discount'] == 0 and line['unit_name'] == 'Unit(s)' and line['quantity'] == 1:
                eprint.text(printline(line['product_name'],pricestr,ratio=0.6))
            else:
                eprint.text(printline(line['product_name'],ratio=0.6))
                if line['discount'] != 0:
                    eprint.text(printline('Discount: '+str(line['discount'])+'%', ratio=0.6, indent=2))
                if line['unit_name'] == 'Unit(s)':
                    eprint.text( printline( quantity(line['quantity']) + ' x ' + price(line['price']), pricestr, ratio=0.6, indent=2))
                else:
                    eprint.text( printline( quantity(line['quantity']) + line['unit_name'] + ' x ' + price(line['price']), pricestr, ratio=0.6, indent=2))

        # Subtotal if the taxes are not included
        taxincluded = True
        if money(receipt['subtotal']) != money(receipt['total_with_tax']):
            eprint.text(printline('','-------'));
            eprint.text(printline(_('Subtotal'),money(receipt['subtotal']),width=40, ratio=0.6))
            print_taxes()
            #eprint.text(printline(_('Taxes'),money(receipt['total_tax']),width=40, ratio=0.6))
            taxincluded = False


        # Total
        eprint.text(printline('','-------'));
        eprint.set(align='center',height=2)
        eprint.text(printline(_('         TOTAL'),money(receipt['total_with_tax']),width=40, ratio=0.6))
        eprint.text('\n\n');

        # Paymentlines
        eprint.set(align='center')
        for line in receipt['paymentlines']:
            eprint.text(printline(line['journal'], money(line['amount']), ratio=0.6))

        eprint.text('\n');
        eprint.set(align='center',height=2)
        eprint.text(printline(_('        CHANGE'),money(receipt['change']),width=40, ratio=0.6))
        eprint.set(align='center')
        eprint.text('\n');

        # Extra Payment info
        if receipt['total_discount'] != 0:
            eprint.text(printline(_('Discounts'),money(receipt['total_discount']),width=40, ratio=0.6))
        if taxincluded:
            print_taxes()
            #eprint.text(printline(_('Taxes'),money(receipt['total_tax']),width=40, ratio=0.6))

        # Footer
        if check(receipt['footer']):
            eprint.text('\n'+receipt['footer']+'\n\n')
        eprint.text(receipt['name']+'\n')
        eprint.text(      str(receipt['date']['date']).zfill(2)
                    +'/'+ str(receipt['date']['month']+1).zfill(2)
                    +'/'+ str(receipt['date']['year']).zfill(4)
                    +' '+ str(receipt['date']['hour']).zfill(2)
                    +':'+ str(receipt['date']['minute']).zfill(2) )

driver = EscposDriver()

driver.push_task('printstatus')

hw_proxy.drivers['escpos'] = driver

class EscposProxy(hw_proxy.Proxy):

    @http.route('/hw_proxy/open_cashbox', type='json', auth='none', cors='*')
    def open_cashbox(self):
        _logger.info('ESC/POS: OPEN CASHBOX')
        driver.push_task('cashbox')

    @http.route('/hw_proxy/print_receipt', type='json', auth='none', cors='*')
    def print_receipt(self, receipt):
        _logger.info('ESC/POS: PRINT RECEIPT')
        driver.push_task('receipt',receipt)

    @http.route('/hw_proxy/print_xml_receipt', type='json', auth='none', cors='*')
    def print_xml_receipt(self, receipt):
        _logger.info('ESC/POS: PRINT XML RECEIPT')
        driver.push_task('xml_receipt',receipt)

    @http.route('/hw_proxy/escpos/add_supported_device', type='http', auth='none', cors='*')
    def add_supported_device(self, device_string):
        _logger.info('ESC/POS: ADDED NEW DEVICE:'+device_string)
        driver.add_supported_device(device_string)
        return "The device:\n"+device_string+"\n has been added to the list of supported devices.<br/><a href='/hw_proxy/status'>Ok</a>"

    @http.route('/hw_proxy/escpos/reset_supported_devices', type='http', auth='none', cors='*')
    def reset_supported_devices(self):
        try:
            os.remove('escpos_devices.pickle')
        except Exception as e:
            pass
        return 'The list of supported devices has been reset to factory defaults.<br/><a href="/hw_proxy/status">Ok</a>'