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| 54 | 2 PEP 237: Unifying Long Integers and Integers</A> |
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| 58 | The lengthy transition process for this PEP, begun in Python 2.2, |
| 59 | takes another step forward in Python 2.4. In 2.3, certain integer |
| 60 | operations that would behave differently after int/long unification |
| 61 | triggered <tt class="exception">FutureWarning</tt> warnings and returned values |
| 62 | limited to 32 or 64 bits (depending on your platform). In 2.4, these |
| 63 | expressions no longer produce a warning and instead produce a |
| 64 | different result that's usually a long integer. |
| 65 | |
| 66 | <P> |
| 67 | The problematic expressions are primarily left shifts and lengthy |
| 68 | hexadecimal and octal constants. For example, |
| 69 | <code>2 << 32</code> results |
| 70 | in a warning in 2.3, evaluating to 0 on 32-bit platforms. In Python |
| 71 | 2.4, this expression now returns the correct answer, 8589934592. |
| 72 | |
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| 75 | <p class="heading">See Also:</p> |
| 76 | |
| 77 | <dl compact="compact" class="seerfc"> |
| 78 | <dt><a href="http://www.python.org/peps/pep-0237.html" |
| 79 | title="Unifying Long Integers and Integers" |
| 80 | >PEP 237, <em>Unifying Long Integers and Integers</em></a> |
| 81 | <dd>Original PEP |
| 82 | written by Moshe Zadka and GvR. The changes for 2.4 were implemented by |
| 83 | Kalle Svensson. |
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