Message 328214 - Python tracker

Thanks, the fix looks good to me.

I made a comparison of some decorator tracing to check it out:  https://gist.github.com/nedbat/d603a34136299f0c0b8e442fccadeb7d

TBH, the first time I tried it, something seemed wrong, but I can't see it now, so ¯\_(ツ)_/¯  :)