It is not clear what "caught" mean. The rough equivalent of the Python code:

try:    ...exceptAttributeError:raisesTypeError

is the C code:

...if (result==NULL) {if (PyErr_ExceptionMatches(PyExc_AttributeError)) {PyErr_SetNone(PyExc_TypeError);    }returnNULL;}

Is an AttributeError exception caught here?

The precise condition inside_PyErr_SetObject is if_PyErr_GetTopmostException returns a non-None value:

So some other ways to say this (without reference to C functions) are (1) if there's an "active exception" (the wording indo_raise()'sRuntimeError message), (2) if an exception is currently being handled (anywhere on the stack), or (3) ifsys.exc_info() would return an exception.

sys.exc_info()'s documentation
https://docs.python.org/3/library/sys.html#sys.exc_info

Do you have a preference?

I would say "active exception". Could you make that change? In that case, I can merge this PR unless@serhiy-storchaka has further comments.

Is the term "active exception" explained anywhere? Should not a link be added?

The term used by thePyErr_Occurred docs is "the error indicator is set".

LGTM.@serhiy-storchaka Can you review it?

All commit authors signed the Contributor License Agreement.