ValueError: Unknown status message: u'KEY_CONSIDERED

If you start to get these errors after upgrading your Linux distribution (for example Ubuntu 18), it's because the gnupg module was changed. To correct this, run the following commands:

sudo pip2 uninstall python-gnupg
sudo pip3 uninstall python-gnupg
pip2 uninstall python-gnupg
pip3 uninstall python-gnupg

Some of these might say there is nothing to do, which is fine. We're just making sure there are NO left overs

Now, do a clean install of the module:

sudo pip install python-gnupg

Now iceshelf should function just fine again.