Perhaps a stupid question, but I don't seem to find any info about it on the web. I would like to take up a (simple) Numpy Trac ticket, and fix it in the Numpy trunk. How can I assign the ticket to myself?

I'm not sure how the trac system is setup @ numpy, but you may not have the perms to do that yourself. Perhaps you can add a comment to the ticket saying that you are working on it (an expected completion date may be helpful)

After logging in, I don't see any obvious way of doing this. Secondly, committing a fix back to the SVN repository seems to require a specific login/pw, how to get one (assuming my fix is welcome)?

You should most likely just attach a patch against the latest trunk to the ticket itself for review. -steve