Implement PEP-487: customisation of class creation

class ABC:
    def __init_subclass__(cls):
        print(cls)


class SubClass(ABC):
    pass

If you run this with python directly, it gives:

<class '__main__.SubClass'>

But after I compile it with cython, it gives:

TypeError                                 Traceback (most recent call last)
<ipython-input-1-a0954f22e2a4> in <module>
----> 1 import test

test.pyx in init test()

TypeError: __init_subclass__() takes exactly one argument (0 given)

How to solve it?

[rayzchen]

I don’t really know how I fixed it but its fixed now…

[rayzchen]

I don’t know what is going on now, but the error is still there. Here is the build: https://ci.appveyor.com/project/rayzchen/pyunity/build/job/i011xbqufc0tj03o

Lines 39-533 are the main focus. Line 39 installs cython 3.0a8, line 57 creates the cython files (using cythonize -3 -q file.py) and the rest is just creating the bdist. However, when I install the wheel provided (tested on both python 3.9 win32 and win_amd64) and run an example, the error happens when subclassing from pyunity.Behaviour, which defines __init_subclass__. But for some reason, it works randomly on another computer that I have open. I really am too confused right now.