python - Global name 'bluetooth' is not defined -

i working bitalino board , wanted print data python when run proper code, shows me message

global name 'bluetooth' not defined

according pc board connected via bluetooth. don't know problem is, me? pd: using mac os x.

this part of code problem may be:

try:     import bluetooth     bluetooth import discover_devices except importerror:     pass import serial serial.tools import list_ports import time import math import numpy    class bitalino(object):      def __init__(self):         """         bitalino class: interface bitalino hardware.          """         self.socket = none         self.analogchannels = []         self.number_bytes = none         self.macaddress = none         self.serial = false      def find(self, serial=false):         """         search bluetooth devices nearby          output: tuple name , mac address of each device found         """          try:             if serial:                 nearby_devices = list(port[0] port in list_ports.comports() if 'bitalino' or 'com' in port[0])             else:                 nearby_devices = discover_devices(lookup_names=true)             return nearby_devices         except:             return -1      def open(self, macaddress=none, samplingrate=1000):         """         connect bluetooth device mac address provided.          configure sampling rate.           kwargs:              macaddress (string): mac address of bluetooth device             samplingrate(int): sampling frequency (hz); values available: 1000, 100, 10 , 1          output: true or -1 (error)         """          setup = true         while setup:             if macaddress != none:                 try:                     if ":" in macaddress , len(macaddress) == 17:                         self.socket = bluetooth.bluetoothsocket(bluetooth.rfcomm)                         self.socket.connect((macaddress, 1))                     else:                         self.socket = serial.serial(macaddress, 115200)                         self.serial = true                     time.sleep(2)                      # configure sampling rate                     if samplingrate == 1000:                         variabletosend = 0x03                     elif samplingrate == 100:                         variabletosend = 0x02                     elif samplingrate == 10:                         variabletosend = 0x01                     elif samplingrate == 1:                         variabletosend = 0x00                     else:                         self.socket.close()                         raise typeerror,  "the sampling rate %s cannot set in bitalino. choose 1000, 100, 10 or 1." % samplingrate                         return -1                      variabletosend = int((variabletosend<<6)|0x03)                     self.write(variabletosend)                     setup = false                  except exception, e:                     print e                     return -1             else:                 raise typeerror, "a mac address or serial port needed connect"                 return -1         else:             self.macaddress = macaddress             return true 

hopefully help: http://lightblue.sourceforge.net/

this api python's bluetooth feature