python – Traceback(最近一次调用最后一次)：Adafruit BME 280传感器

我已经成功安装了Adafruit_Gpio包,当我尝试运行adafruit提供的bme传感器的示例文件时,我收到以下错误：

  TraceBACk (most recent call last):
  File "/home/rpi3/Adafruit_Python_BME280/example.py",line 3,in __init__
    self._device = i2c.get_i2c_device(address,**kwargs)
  File "/usr/local/lib/python3.5/dist-packages/Adafruit_GPIO-1.0.3-py3.5.egg/Adafruit_GPIO/I2C.py",line 64,in get_i2c_device
    return Device(address,busnum,i2c_interface,line 97,in __init__
    self._bus = Adafruit_PureIO.smbus.SMBus(busnum)
  File "/usr/local/lib/python3.5/dist-packages/Adafruit_PureIO/smbus.py",in __init__
    self.open(bus)
  File "/usr/local/lib/python3.5/dist-packages/Adafruit_PureIO/smbus.py",line 122,in open
    self._device = open('/dev/i2c-{0}'.format(bus),'r+b',buffering=0)
FileNotFoundError: [Errno 2] No such file or directory: '/dev/i2c-1'

我在xubuntu上为rpi-3我运行了apt-get udpate并重新启动机器都没有工作.