Phase B will be implemented starting with Python 2.3. The remaining semantic differenes are addressed. Operations that give different results than before will issue a warning that is on by default. The warning for long literals is turned on by default. The warnings about operations that give different results than before are turned off by default.
Long literals are no longer legal.
All warnings related to this issue are gone. Python 2.4. B3. The rest of the Python 2.x line. B4. OverflowWarning Here are the rules that guide warnings generated in situations that currently raise OverflowError. This applies to transition phase A. - A new warning category is introduced, OverflowWarning.