Mercurial > cpython-lru_cache-weakref

annotate Doc/lib/libtypes.tex @ 25838:8540887bcec6 2.2

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Backport of 2.183: Fix memory leak in add_subclass() found by NealN with valgrind.
author Guido van Rossum <guido@python.org>
date Fri, 18 Oct 2002 13:42:21 +0000
parents 7ab8c3811723
children
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1 \section{\module{types} ---
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2 Names for all built-in types}
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3
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4 \declaremodule{standard}{types}
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5 \modulesynopsis{Names for all built-in types.}
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6
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8 This module defines names for all object types that are used by the
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9 standard Python interpreter, but not for the types defined by various
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10 extension modules. It is safe to use \samp{from types import *} ---
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11 the module does not export any names besides the ones listed here.
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12 New names exported by future versions of this module will all end in
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13 \samp{Type}.
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14
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15 Typical use is for functions that do different things depending on
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16 their argument types, like the following:
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17
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18 \begin{verbatim}
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19 from types import *
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20 def delete(list, item):
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21 if type(item) is IntType:
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22 del list[item]
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23 else:
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24 list.remove(item)
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25 \end{verbatim}
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26
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27 The module defines the following names:
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28
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29 \begin{datadesc}{NoneType}
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30 The type of \code{None}.
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31 \end{datadesc}
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32
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33 \begin{datadesc}{TypeType}
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34 The type of type objects (such as returned by
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35 \function{type()}\bifuncindex{type}).
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36 \end{datadesc}
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38 \begin{datadesc}{IntType}
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39 The type of integers (e.g. \code{1}).
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40 \end{datadesc}
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42 \begin{datadesc}{LongType}
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43 The type of long integers (e.g. \code{1L}).
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44 \end{datadesc}
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46 \begin{datadesc}{FloatType}
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47 The type of floating point numbers (e.g. \code{1.0}).
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48 \end{datadesc}
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49
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50 \begin{datadesc}{ComplexType}
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51 The type of complex numbers (e.g. \code{1.0j}). This is not defined
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52 if Python was built without complex number support.
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53 \end{datadesc}
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54
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55 \begin{datadesc}{StringType}
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56 The type of character strings (e.g. \code{'Spam'}).
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57 \end{datadesc}
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58
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59 \begin{datadesc}{UnicodeType}
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60 The type of Unicode character strings (e.g. \code{u'Spam'}). This is
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61 not defined if Python was built without Unicode support.
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62 \end{datadesc}
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63
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64 \begin{datadesc}{TupleType}
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65 The type of tuples (e.g. \code{(1, 2, 3, 'Spam')}).
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66 \end{datadesc}
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68 \begin{datadesc}{ListType}
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69 The type of lists (e.g. \code{[0, 1, 2, 3]}).
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70 \end{datadesc}
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72 \begin{datadesc}{DictType}
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73 The type of dictionaries (e.g. \code{\{'Bacon': 1, 'Ham': 0\}}).
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74 \end{datadesc}
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76 \begin{datadesc}{DictionaryType}
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77 An alternate name for \code{DictType}.
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78 \end{datadesc}
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80 \begin{datadesc}{FunctionType}
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81 The type of user-defined functions and lambdas.
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82 \end{datadesc}
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83
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84 \begin{datadesc}{LambdaType}
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85 An alternate name for \code{FunctionType}.
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86 \end{datadesc}
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87
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88 \begin{datadesc}{GeneratorType}
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89 The type of generator-iterator objects, produced by calling a
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90 generator function.
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91 \versionadded{2.2}
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92 \end{datadesc}
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93
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94 \begin{datadesc}{CodeType}
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95 The type for code objects such as returned by
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96 \function{compile()}\bifuncindex{compile}.
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97 \end{datadesc}
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99 \begin{datadesc}{ClassType}
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100 The type of user-defined classes.
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101 \end{datadesc}
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103 \begin{datadesc}{InstanceType}
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104 The type of instances of user-defined classes.
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105 \end{datadesc}
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107 \begin{datadesc}{MethodType}
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108 The type of methods of user-defined class instances.
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109 \end{datadesc}
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111 \begin{datadesc}{UnboundMethodType}
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112 An alternate name for \code{MethodType}.
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113 \end{datadesc}
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115 \begin{datadesc}{BuiltinFunctionType}
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116 The type of built-in functions like \function{len()} or
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117 \function{sys.exit()}.
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118 \end{datadesc}
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120 \begin{datadesc}{BuiltinMethodType}
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121 An alternate name for \code{BuiltinFunction}.
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122 \end{datadesc}
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124 \begin{datadesc}{ModuleType}
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125 The type of modules.
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126 \end{datadesc}
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128 \begin{datadesc}{FileType}
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129 The type of open file objects such as \code{sys.stdout}.
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130 \end{datadesc}
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132 \begin{datadesc}{XRangeType}
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133 The type of range objects returned by
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134 \function{xrange()}\bifuncindex{xrange}.
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135 \end{datadesc}
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136
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137 \begin{datadesc}{SliceType}
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138 The type of objects returned by
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139 \function{slice()}\bifuncindex{slice}.
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140 \end{datadesc}
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141
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142 \begin{datadesc}{EllipsisType}
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143 The type of \code{Ellipsis}.
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144 \end{datadesc}
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145
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146 \begin{datadesc}{TracebackType}
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147 The type of traceback objects such as found in
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148 \code{sys.exc_traceback}.
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149 \end{datadesc}
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150
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151 \begin{datadesc}{FrameType}
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152 The type of frame objects such as found in \code{tb.tb_frame} if
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153 \code{tb} is a traceback object.
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154 \end{datadesc}
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155
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156 \begin{datadesc}{BufferType}
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157 The type of buffer objects created by the
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158 \function{buffer()}\bifuncindex{buffer} function.
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159 \end{datadesc}
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160
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161 \begin{datadesc}{StringTypes}
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162 A sequence containing \code{StringType} and \code{UnicodeType} used to
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163 facilitate easier checking for any string object. Using this is more
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164 portable than using a sequence of the two string types constructed
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165 elsewhere since it only contains \code{UnicodeType} if it has been
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166 built in the running version of Python. For example:
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167 \code{isinstance(s, types.StringTypes)}.
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168 \versionadded{2.2}
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169 \end{datadesc}