使用raspberry pi4的扫描设备的bluepy库出错

Question

我在我的raspberry Pi4上用bluepy library为扫描蓝牙设备运行此代码

while True:
try:
    #10.0 sec scanning
    ble_list = ble.Scanner().scan(10)
    for dev in ble_list:
        print("rssi: {} ; mac: {}".format(dev.rssi,dev.addr))
except:
    raise Exception("Error occured")

但我有一个错误：

Traceback (most recent call last):
  File "/home/pi/Desktop/Progetti SIoTD/Bluetooth/prova2.py", line 4, in <module>
    devices = scanner.scan(10.0)
  File "/home/pi/Desktop/Progetti SIoTD/bluepy/btle.py", line 885, in scan
    self.start(passive=passive)
  File "/home/pi/Desktop/Progetti SIoTD/bluepy/btle.py", line 823, in start
    self._mgmtCmd("le on")
  File "/home/pi/Desktop/Progetti SIoTD/bluepy/btle.py", line 325, in _mgmtCmd
    raise BTLEManagementError("Failed to execute management command '%s'" % (cmd), rsp)
bluepy.btle.BTLEManagementError: Failed to execute management command 'le on' (code: 20, error: Permission Denied)

Process finished with exit code 1

有人知道错误是什么吗？ 提前谢谢

更新：

如果在终端中运行脚本（使用sudo），则会出现以下错误：

Traceback (most recent call last):
  File "prova2.py", line 1, in <module>
    import bluepy.btle as ble
  File "/usr/local/lib/python2.7/dist-packages/bluepy-1.3.0-py2.7.egg/bluepy/__init__.py", line 2, in <module>
    from . import btle
  File "/usr/local/lib/python2.7/dist-packages/bluepy-1.3.0-py2.7.egg/bluepy/btle.py", line 14, in <module>
    from queue import Queue, Empty
ImportError: No module named queue

如果我使用python IDE Pycharm运行相同的脚本，错误是：

Traceback (most recent call last):
  File "/home/pi/Desktop/Progetti SIoTD/Bluetooth/prova2.py", line 6, in <module>
    ble_list = ble.Scanner().scan(10)
  File "/home/pi/Desktop/Progetti SIoTD/bluepy/btle.py", line 885, in scan
    self.start(passive=passive)
  File "/home/pi/Desktop/Progetti SIoTD/bluepy/btle.py", line 823, in start
    self._mgmtCmd("le on")
  File "/home/pi/Desktop/Progetti SIoTD/bluepy/btle.py", line 325, in _mgmtCmd
    raise BTLEManagementError("Failed to execute management command '%s'" % (cmd), rsp)
bluepy.btle.BTLEManagementError: Failed to execute management command 'le on' (code: 20, error: Permission Denied)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/pi/Desktop/Progetti SIoTD/Bluetooth/prova2.py", line 10, in <module>
    raise Exception("Error occured")
Exception: Error occured

相反，如果我使用python3在终端中执行脚本：

Traceback (most recent call last):
  File "prova2.py", line 1, in <module>
    import bluepy.btle as ble
ModuleNotFoundError: No module named 'bluepy'