ImportError: No module named 'catkin_pkg

Traceback (most recent call last):
  File "/home/gary/.local/bin/catkin_create_pkg", line 7, in <module>
    from catkin_pkg.cli.create_pkg import main
ImportError: No module named 'catkin_pkg'

解决方法：找到文件catkin_create_pkg，将python3->python2