I've noticed regression related to callable() optimization. https://github.com/cython/cython/commit/a40112b0461eae5ab22fbdd07ae798d4a72ff523
class C: pass print callable(C()) It prints True optimized version checks ((obj)->ob_type->tp_call != NULL) condition that is True for both class and instance. >>> help(callable) callable(...) callable(object) -> bool Return whether the object is callable (i.e., some kind of function). Note that classes are callable, as are instances with a __call__() method. -- vitja. _______________________________________________ cython-devel mailing list cython-devel@python.org http://mail.python.org/mailman/listinfo/cython-devel