liuxg@liuxg:~$ sudo dpkg -P click
(Reading database ... 349318 files and directories currently installed.)
Removing click (0.4.43+16.04.20160203-0ubuntu3) ...
Traceback (most recent call last):
  File "/usr/bin/click", line 37, in <module>
    import click
ImportError: No module named 'click'
dpkg: error processing package click (--purge):
 subprocess installed pre-removal script returned error exit status 1
Job for click-system-hooks.service failed because the control process exited with error code. See "systemctl status click-system-hooks.service" and "journalctl -xe" for details.
click-system-hooks.service couldn't start.
Errors were encountered while processing:
 click