[issue39806] different behavior between __ior__ and __or__ in dict made by PEP 584

[Manjusaka]

Manjusaka <lizheao940510 at gmail.com> added the comment:

> Augmented assignment behaves identically to the update method called with a single positional argument, so it also accepts anything implementing the Mapping protocol (more specifically, anything with the keys and __getitem__ methods) or iterables of key-value pairs. This is analogous to list += and list.extend, which accept any iterable, not just lists. Continued from above:

But the __or__ in implementation doesn't restrict the type of the input data. But it's almost the same with __ior__. I think we should keep the behavior as same as possible. some lenient or same restrictive

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<https://bugs.python.org/issue39806>
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