全球名「藍牙」沒有定義

Question

我與bitalino板工作，我想打印使用Python的數據，但是當我運行正確的代碼，它讓我看到消息

全局名稱「藍牙'未定義

根據我的電腦板通過藍牙連接。我不知道問題是什麼，你能幫我嗎？ PD：我使用的是Mac OS X.

這是代碼的一部分，其中的問題可能是：

try: 
    import bluetooth 
    from bluetooth import discover_devices 
except ImportError: 
    pass 
import serial 
from serial.tools import list_ports 
import time 
import math 
import numpy 



class BITalino(object): 

    def __init__(self): 
     """ 
     BITalino class: interface to the BITalino hardware. 

     """ 
     self.socket = None 
     self.analogChannels = [] 
     self.number_bytes = None 
     self.macAddress = None 
     self.serial = False 

    def find(self, serial=False): 
     """ 
     Search for bluetooth devices nearby 

     Output: tuple with name and mac address of each device found 
     """ 

     try: 
      if serial: 
       nearby_devices = list(port[0] for 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 to bluetooth device with the mac address provided. 
     Configure the sampling Rate. 

     Kwargs: 

      macAddress (string): MAC address of the bluetooth device 
      SamplingRate(int): Sampling frequency (Hz); values available: 1000, 100, 10 and 1 

     Output: True or -1 (error) 
     """ 

     Setup = True 
     while Setup: 
      if macAddress != None: 
       try: 
        if ":" in macAddress and 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 be 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 is needed to connect" 
       return -1 
     else: 
      self.macAddress = macAddress 
      return True 

Answer 1

希望這將有助於： http://lightblue.sourceforge.net/

這是Python的一個API藍牙功能

Answer 2

通常情況下，如果出現問題導致導入失敗，那麼我將刪除try..except並僅執行正常導入。

使用它在進口，如果你是無動於衷，你想用什麼庫的唯一原因：

try: 
    import json 
except ImportError: 
    import simplejson as json