Ethan Furman <[email protected]> added the comment:
Patch attached. It basically says:
8<--------------------------------------------------------------------
Note: Because using :keyword:`from` can throw away valuable debugging
information, its use with a bare :keyword:`raise` is not supported. If you are
trying to do this:
try:
some_module.not_here()
except NameError:
try:
backup_module.not_here()
except NameError:
raise from None # suppress context in NameError
do this instead:
try:
some_module.not_here()
except NameError:
try:
backup_module.not_here()
except NameError as exc:
raise exc from None # suppress context in NameError
8<--------------------------------------------------------------------
----------
keywords: +patch
Added file: http://bugs.python.org/file26191/raise_from_doc_update.diff
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<http://bugs.python.org/issue15209>
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