Tobias Hansen added the comment: This change breaks backward compatibility in Python 2.7. This is the example that also broke in #25731. In that case the change was reverted. See https://bugs.python.org/issue25731#msg262922
$ cat foo.pxd cdef class B: cdef object b $ cat foo.pyx cdef class A: pass cdef class B: def __init__(self, b): self.b = b $ cat bar.py from foo import A, B class C(A, B): def __init__(self): B.__init__(self, 1) C() $ cython foo.pyx && gcc -I/usr/include/python2.7 -Wall -shared -fPIC -o foo.so foo.c $ python -c 'import bar' Traceback (most recent call last): File "<string>", line 1, in <module> File "bar.py", line 7, in <module> C() TypeError: foo.A.__new__(C) is not safe, use foo.B.__new__() ---------- nosy: +thansen _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue5322> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com