sudo apt-get install python-smbus 报错 sudo apt-get install python-smbus 报错 python-smbus : Depends: python (< 2.8)Depends: python (>= 2.7~)Depends: python:any (< 2.8)Depends: python:any (>= 2.7~) E: Unable to correct problems, you have held broken packages. 改用 sudo apt-get install python3-smbus