PEP 785: why not more attributes

Author: Zac-HD

peps/pep-0785.rst

@@ -329,6 +329,20 @@ less magical and tempting to use in cases where it would not be appropriate.
 We could be argued around though, if others prefer this form.
 
 
+Preserve additional attributes
+------------------------------
+
+We decided against preserving the ``__cause__`` and ``__suppress_context__``
+attributes, because they are not changed by re-raising the exception, and we
+prefer to support ``raise exc from None`` or ``raise exc from cause_exc``
+together with ``with exc.preserve_context():``.
+
+Similarly, we considered preserving the ``__traceback__`` attribute, and
+decided against because the additional ``raise ...`` statement may be an
+important clue when understanding some error. If end users wish to pop a
+frame from the traceback, they can do with a separate context manager.
+
+
 Footnotes
 =========