import math
import openerp.addons.hw_proxy.controllers.main as hw_proxy
import subprocess
-import usb.core
+
+try:
+ import usb.core
+except: ImportError:
+ usb = None
+
from openerp.tools.translate import _
from .. import escpos
from ..escpos import printer
'''
import Image
-import qrcode
+
+try:
+ import qrcode
+except ImportError:
+ qrcode = None
+
import time
import copy
try:
import jcconv
-except:
+except ImportError:
jcconv = None
print 'ESC/POS: please install jcconv for improved Japanese receipt printing:'
print ' # pip install jcconv'