I'm kinda curious about this one, have you started looking at this one already? If not I'll take a shot

@rtpg No, I didn't. I opened this issue as a task card. You can take this one. 😉

__or__ and __ror__ needs to be implemented in type. type is defined in vm/src/builtins/pytype.rs as PyType struct.
Other types __or__ implementation will be useful. it can be found in any type implementing | operator, like int, set and other types. For those types, search for fn or in vm/src/builtins/<typename>.rs.

By looking at links of the the issue, CPython seems to implement Union in C now. I think we can use python version at the first - if we are not going to implement Union type at the same time.
To bring Union from typing.py, VirtualMachine::import is useful. Search for vm.import for the use cases.
To get attribute __getitem__ and invoke the method, search for vm.get_attribute_opt and vm.invoke.

Take this one in PyCcon APAC 2021 sprint

@moreal is this done?

@moreal is this done?

@youknowone As I know, I believe it is done.