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The lengthy transition process for this PEP, begun in Python 2.2,
takes another step forward in Python 2.4. In 2.3, certain integer
operations that would behave differently after int/long unification
triggered FutureWarning warnings and returned values
limited to 32 or 64 bits (depending on your platform). In 2.4, these
expressions no longer produce a warning and instead produce a
different result that's usually a long integer.
The problematic expressions are primarily left shifts and lengthy
hexadecimal and octal constants. For example,
2 << 32 results
in a warning in 2.3, evaluating to 0 on 32-bit platforms. In Python
2.4, this expression now returns the correct answer, 8589934592.
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