Message 249435 - Python tracker

I totally agree, on the other hand, if the detach() method can cause that some core methods like shutil.get_termina_size() raise an exception then I think that should be warned in the doc of detach().

In all places that I've seen, the detach() method is used to overwrite the stdout in py3, so a sort of advice about the using of detach() It'd save some problems.