I tested with Lubuntu 16.04 LTS. First I uninstalled python-gi (which removed lubuntu-software-center and lubuntu-desktop.) Then I installed gufw. It didn't run.
Then I installed gufw from -proposed which has a hard dependency on python-gi. Once python-gi was installed again, gufw runs.
I tested with Lubuntu 16.04 LTS. First I uninstalled python-gi (which removed lubuntu- software- center and lubuntu-desktop.) Then I installed gufw. It didn't run.
Then I installed gufw from -proposed which has a hard dependency on python-gi. Once python-gi was installed again, gufw runs.