Thread safe?

Is launchpadlib thread safe? If so, are there any guidelines to use threads in a launchpadlib script?

I'm working in a script that gets all the bugs for a given project and, after that, gathers some additional information from each bug. The problem is that the script takes a really long time to complete so I've tried to speed it up by using a separate thread for each bug, but I get several errors so I'm not sure I can use launchpadlib this way.