This is expected behavior from upstream changes.
https://github.com/python/typing/commit/7baf6fe2a6d96ab09c807aac174650baa35d15dd
Optional is shorthand for Union, and Union cannot be subclassed. This
behavior "worked" before, but was undefined and returned unpredictable
results.
** Changed in: python3.5 (Ubuntu)
Status: New => Invalid
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1650202
Title:
issubclass(a_type, union_type) has stopped working
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/python3.5/+bug/1650202/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
