projects / OpenSPARC-T2-SAM / blame
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| 55 | <H2><A NAME="SECTION007220000000000000000"></A><A NAME="atom-literals"></A> | |
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| 57 | <BR> | |
| 58 | 5.2.2 Literals | |
| 59 | </H2> | |
| 60 | ||
| 61 | <P> | |
| 62 | Python supports string literals and various numeric literals: | |
| 63 | ||
| 64 | <P> | |
| 65 | <dl><dd class="grammar"> | |
| 66 | <div class="productions"> | |
| 67 | <table> | |
| 68 | <tr> | |
| 69 | <td><a id='tok-literal' xml:id='tok-literal'>literal</a></td> | |
| 70 | <td>::=</td> | |
| 71 | <td><a class='grammartoken' href="strings.html#tok-stringliteral">stringliteral</a> | <a class='grammartoken' href="integers.html#tok-integer">integer</a> | <a class='grammartoken' href="integers.html#tok-longinteger">longinteger</a></td></tr> | |
| 72 | <tr> | |
| 73 | <td></td> | |
| 74 | <td></td> | |
| 75 | <td><code>| <a class='grammartoken' href="floating.html#tok-floatnumber">floatnumber</a> | <a class='grammartoken' href="imaginary.html#tok-imagnumber">imagnumber</a></code></td></tr> | |
| 76 | </table> | |
| 77 | </div> | |
| 78 | <a class="grammar-footer" | |
| 79 | href="grammar.txt" type="text/plain" | |
| 80 | >Download entire grammar as text.</a> | |
| 81 | </dd></dl> | |
| 82 | ||
| 83 | <P> | |
| 84 | Evaluation of a literal yields an object of the given type (string, | |
| 85 | integer, long integer, floating point number, complex number) with the | |
| 86 | given value. The value may be approximated in the case of floating | |
| 87 | point and imaginary (complex) literals. See section <A href="literals.html#literals">2.4</A> | |
| 88 | for details. | |
| 89 | ||
| 90 | <P> | |
| 91 | All literals correspond to immutable data types, and hence the | |
| 92 | object's identity is less important than its value. Multiple | |
| 93 | evaluations of literals with the same value (either the same | |
| 94 | occurrence in the program text or a different occurrence) may obtain | |
| 95 | the same object or a different object with the same value. | |
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| 133 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> | |
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