Changed statements of the form Py_DECREF(obj), obj = 0 to Py_CLEAR(obj).

in Py_CLEAR().

Fix issue 3221 by emitting a RuntimeWarning instead of raising SystemError when the parent module can't be found during an absolute import (likely due to non-PEP 361 aware code which sets a module level __package__ attribute)

Correct a couple of errors in the updated catch_warning documentation (the Py3k version was fixed before being checked in)

Make test.test_support.catch_warnings more robust as discussed on python-dev. Also add explicit tests for itto test_warnings.

should have returned True.

Fixes issue #3339. Thanks, Henk Punt for the report and Andrii v. Mishkovskiyi
for attempting a patch.

#3343: Py_DisplaySourceLine should be a private function. Rename it to _Py_DisplaySourceLine.

some applications relied on them.

Also remove duplicated lines.

3.0.

sys.getsizeof.

Issue3122.

Issue 2517: Allow unicode messages in Exceptions again by correctly bypassing the instance dictionary when looking up __unicode__ on new-style classes