[issue29221] ABC Recursion Error on isinstance() with less than recursion limit class hierarchy depth

New submission from Anthony Scopatz: Classes that have an abstract base class somewhere in their hierarchy have a significantly reduced depth with respect to the recursion limit. In the attached minimal example, the class hierarchy is only able to be 245 deep past the ABC before a recursion

[issue29221] ABC Recursion Error on isinstance() with less than recursion limit class hierarchy depth

Anthony Scopatz added the comment: It certainly seems related. Attached is an image that displays the scaling of the cache example. The full notebook that generated this image is at [1]. The notebook shows that it does seem to converge towards a value of 1/6th. 1. https://gist.github.com

[issue15451] PATH is not honored in subprocess.Popen in win32

Changes by Anthony Scopatz : -- nosy: +Anthony Scopatz versions: +Python 3.6 ___ Python tracker <http://bugs.python.org/issue15451> ___ ___ Python-bugs-list mailin