Open Stack

If you are seeing this error when implementing and running the upgrade 
check command in your project:

Traceback (most recent call last):
   File 
"/home/osboxes/git/searchlight/.tox/venv/lib/python3.5/site-packages/oslo_upgradecheck/upgradecheck.py", 
line 184, in main
     return conf.command.action_fn()
   File 
"/home/osboxes/git/searchlight/.tox/venv/lib/python3.5/site-packages/oslo_upgradecheck/upgradecheck.py", 
line 134, in check
     print(t)
   File 
"/home/osboxes/git/searchlight/.tox/venv/lib/python3.5/site-packages/prettytable.py", 
line 237, in __str__
     return self.__unicode__()
   File 
"/home/osboxes/git/searchlight/.tox/venv/lib/python3.5/site-packages/prettytable.py", 
line 243, in __unicode__
     return self.get_string()
   File 
"/home/osboxes/git/searchlight/.tox/venv/lib/python3.5/site-packages/prettytable.py", 
line 995, in get_string
     lines.append(self._stringify_header(options))
   File 
"/home/osboxes/git/searchlight/.tox/venv/lib/python3.5/site-packages/prettytable.py", 
line 1066, in _stringify_header
     bits.append(" " * lpad + self._justify(fieldname, width, 
self._align[field]) + " " * rpad)
   File 
"/home/osboxes/git/searchlight/.tox/venv/lib/python3.5/site-packages/prettytable.py", 
line 187, in _justify
     return text + excess * " "
   File 
"/home/osboxes/git/searchlight/.tox/venv/lib/python3.5/site-packages/oslo_i18n/_message.py", 
line 230, in __add__
     raise TypeError(msg)
TypeError: Message objects do not support addition.

It is due to calling oslo_i18n.enable_lazy() somewhere in the command 
import path. That should be removed from the project since lazy 
translation is not supported in openstack and as an effort was abandoned 
several years ago. It is probably still called in a lot of "big 
tent/stackforge" projects because of initially copying it from the more 
core projects. Anyway, just remove it.

I'm talking with the oslo team about deprecating that interface so 
projects don't mistakenly use it and expect great things to happen.

-- 

Thanks,

Matt