Calling tp_init does not call __init__
Created originally on Bitbucket by lazka (Christoph Reiter)
Minimal example extension: https://gist.github.com/lazka/871913fb1442d214e9f4d77d3ff7396c
From what I see doing a PyObject_CallMethod (obj, "__init__", NULL);
works just as well, so I'll use that instead.