projects / OpenSPARC-T2-SAM / blame
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| 17 | <title>2.3 Built-in Types </title> | |
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| 54 | ||
| 55 | <H1><A NAME="SECTION004300000000000000000"></A><A NAME="types"></A> | |
| 56 | <BR> | |
| 57 | 2.3 Built-in Types | |
| 58 | </H1> | |
| 59 | ||
| 60 | <P> | |
| 61 | The following sections describe the standard types that are built into | |
| 62 | the interpreter. Historically, Python's built-in types have differed | |
| 63 | from user-defined types because it was not possible to use the built-in | |
| 64 | types as the basis for object-oriented inheritance. With the 2.2 | |
| 65 | release this situation has started to change, although the intended | |
| 66 | unification of user-defined and built-in types is as yet far from | |
| 67 | complete. | |
| 68 | ||
| 69 | <P> | |
| 70 | The principal built-in types are numerics, sequences, mappings, files | |
| 71 | classes, instances and exceptions. | |
| 72 | <a id='l2h-89' xml:id='l2h-89'></a> | |
| 73 | <P> | |
| 74 | Some operations are supported by several object types; in particular, | |
| 75 | practically all objects can be compared, tested for truth value, | |
| 76 | and converted to a string (with the <code>` ...`</code> notation, | |
| 77 | the equivalent <tt class="function">repr()</tt> function, or the slightly different | |
| 78 | <tt class="function">str()</tt> function). The latter | |
| 79 | function is implicitly used when an object is written by the | |
| 80 | <tt class="keyword">print</tt><a id='l2h-90' xml:id='l2h-90'></a> statement. | |
| 81 | (Information on <a class="ulink" href="../ref/print.html" | |
| 82 | ><tt class="keyword">print</tt> statement</a> | |
| 83 | and other language statements can be found in the | |
| 84 | <em class="citetitle"><a | |
| 85 | href="../ref/ref.html" | |
| 86 | title="Python Reference Manual" | |
| 87 | >Python Reference Manual</a></em> and the | |
| 88 | <em class="citetitle"><a | |
| 89 | href="../tut/tut.html" | |
| 90 | title="Python Tutorial" | |
| 91 | >Python Tutorial</a></em>.) | |
| 92 | ||
| 93 | <P> | |
| 94 | ||
| 95 | <p><br /></p><hr class='online-navigation' /> | |
| 96 | <div class='online-navigation'> | |
| 97 | <!--Table of Child-Links--> | |
| 98 | <A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></a> | |
| 99 | ||
| 100 | <UL CLASS="ChildLinks"> | |
| 101 | <LI><A href="truth.html">2.3.1 Truth Value Testing</a> | |
| 102 | <LI><A href="boolean.html">2.3.2 Boolean Operations -- | |
| 103 | <tt class="keyword">and</tt>, <tt class="keyword">or</tt>, <tt class="keyword">not</tt></a> | |
| 104 | <LI><A href="comparisons.html">2.3.3 Comparisons</a> | |
| 105 | <LI><A href="typesnumeric.html">2.3.4 Numeric Types -- | |
| 106 | <tt class="class">int</tt>, <tt class="class">float</tt>, <tt class="class">long</tt>, <tt class="class">complex</tt></a> | |
| 107 | <UL> | |
| 108 | <LI><A href="bitstring-ops.html">2.3.4.1 Bit-string Operations on Integer Types</a> | |
| 109 | </ul> | |
| 110 | <LI><A href="typeiter.html">2.3.5 Iterator Types</a> | |
| 111 | <LI><A href="typesseq.html">2.3.6 Sequence Types -- | |
| 112 | <tt class="class">str</tt>, <tt class="class">unicode</tt>, <tt class="class">list</tt>, | |
| 113 | <tt class="class">tuple</tt>, <tt class="class">buffer</tt>, <tt class="class">xrange</tt></a> | |
| 114 | <UL> | |
| 115 | <LI><A href="string-methods.html">2.3.6.1 String Methods</a> | |
| 116 | <LI><A href="typesseq-strings.html">2.3.6.2 String Formatting Operations</a> | |
| 117 | <LI><A href="typesseq-xrange.html">2.3.6.3 XRange Type</a> | |
| 118 | <LI><A href="typesseq-mutable.html">2.3.6.4 Mutable Sequence Types</a> | |
| 119 | </ul> | |
| 120 | <LI><A href="types-set.html">2.3.7 Set Types -- | |
| 121 | <tt class="class">set</tt>, <tt class="class">frozenset</tt></a> | |
| 122 | <LI><A href="typesmapping.html">2.3.8 Mapping Types -- classdict</a> | |
| 123 | <LI><A href="bltin-file-objects.html">2.3.9 File Objects</a> | |
| 124 | <LI><A href="typesother.html">2.3.10 Other Built-in Types</a> | |
| 125 | <UL> | |
| 126 | <LI><A href="typesmodules.html">2.3.10.1 Modules</a> | |
| 127 | <LI><A href="typesobjects.html">2.3.10.2 Classes and Class Instances</a> | |
| 128 | <LI><A href="typesfunctions.html">2.3.10.3 Functions</a> | |
| 129 | <LI><A href="typesmethods.html">2.3.10.4 Methods</a> | |
| 130 | <LI><A href="bltin-code-objects.html">2.3.10.5 Code Objects</a> | |
| 131 | <LI><A href="bltin-type-objects.html">2.3.10.6 Type Objects</a> | |
| 132 | <LI><A href="bltin-null-object.html">2.3.10.7 The Null Object</a> | |
| 133 | <LI><A href="bltin-ellipsis-object.html">2.3.10.8 The Ellipsis Object</a> | |
| 134 | <LI><A href="node31.html">2.3.10.9 Boolean Values</a> | |
| 135 | <LI><A href="typesinternal.html">2.3.10.10 Internal Objects</a> | |
| 136 | </ul> | |
| 137 | <LI><A href="specialattrs.html">2.3.11 Special Attributes</a> | |
| 138 | </ul> | |
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| 151 | href="builtin.html"><img src='../icons/up.png' | |
| 152 | border='0' height='32' alt='Up One Level' width='32' /></A></td> | |
| 153 | <td class='online-navigation'><a rel="next" title="2.3.1 Truth Value Testing" | |
| 154 | href="truth.html"><img src='../icons/next.png' | |
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| 173 | </div> | |
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| 176 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> | |
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