To answer the question, that came up: Yes, the 0.x number also put me down at first. But I am using this tool now several years, since 0.13 or maybe earlier an

To answer the question, that came up: Yes, the 0.x number also put me down at first. But I am using this tool now several years, since 0.13 or maybe earlier and did never find a bug or problem. Cython is great, in-spite of its version number! I also inspected the generated code several times and it looks rock-solid. Also one big advantage (for me): It can produce code that runs equally on 2.x and 3.x versions (there are some limitations, though, like several really outdated versions are not supported any more).