touchpad-indicator crashing on ubuntu 18.04

[Jocelyn Habib]

Traceback (most recent call last):
  File "/usr/bin/touchpad-indicator", line 34, in <module>
    from touchpadindicator import main
  File "/usr/share/touchpad-indicator/touchpadindicator.py", line 47, in <module>
    from watchdog import is_mouse_plugged
  File "/usr/share/touchpad-indicator/watchdog.py", line 22, in <module>
    import pyudev
  File "/usr/lib/python3/dist-packages/pyudev/__init__.py", line 43, in <module>
    from pyudev.device import Attributes
  File "/usr/lib/python3/dist-packages/pyudev/device/__init__.py", line 28, in <module>
    from ._device import Attributes
  File "/usr/lib/python3/dist-packages/pyudev/device/_device.py", line 40, in <module>
    from pyudev.device._errors import DeviceNotFoundAtPathError
  File "/usr/lib/python3/dist-packages/pyudev/device/_errors.py", line 34, in <module>
    from six import add_metaclass
ImportError: bad magic number in 'six': b'\x03\xf3\r\n'