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<?xml version="1.0" encoding="ascii"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>babel.support.LazyProxy</title> <link rel="stylesheet" href="epydoc.css" type="text/css" /> <script type="text/javascript" src="epydoc.js"></script> </head> <body bgcolor="white" text="black" link="blue" vlink="#204080" alink="#204080"> <!-- ==================== NAVIGATION BAR ==================== --> <table class="navbar" border="0" width="100%" cellpadding="0" bgcolor="#a0c0ff" cellspacing="0"> <tr valign="middle"> <!-- Home link --> <th> <a href="babel-module.html">Home</a> </th> <!-- Tree link --> <th> <a href="module-tree.html">Trees</a> </th> <!-- Index link --> <th> <a href="identifier-index.html">Indices</a> </th> <!-- Help link --> <th> <a href="help.html">Help</a> </th> <!-- Project homepage --> <th class="navbar" align="right" width="100%"> <table border="0" cellpadding="0" cellspacing="0"> <tr><th class="navbar" align="center" ><a class="navbar" target="_top" href="../index.html">Documentation Index</a></th> </tr></table></th> </tr> </table> <table width="100%" cellpadding="0" cellspacing="0"> <tr valign="top"> <td width="100%"> <span class="breadcrumbs"> <a href="babel-module.html">Package babel</a> :: <a href="babel.support-module.html">Module support</a> :: Class LazyProxy </span> </td> <td> <table cellpadding="0" cellspacing="0"> <!-- hide/show private --> </table> </td> </tr> </table> <!-- ==================== CLASS DESCRIPTION ==================== --> <h1 class="epydoc">Class LazyProxy</h1><p class="nomargin-top"></p> <pre class="base-tree"> object --+ | <strong class="uidshort">LazyProxy</strong> </pre> <hr /> <p>Class for proxy objects that delegate to a specified function to evaluate the actual object.</p> <pre class="py-doctest"> <span class="py-prompt">>>> </span><span class="py-keyword">def</span> <span class="py-defname">greeting</span>(name=<span class="py-string">'world'</span>): <span class="py-more">... </span> return <span class="py-string">'Hello, %s!'</span> % name <span class="py-prompt">>>> </span>lazy_greeting = LazyProxy(greeting, name=<span class="py-string">'Joe'</span>) <span class="py-prompt">>>> </span><span class="py-keyword">print</span> lazy_greeting <span class="py-output">Hello, Joe!</span> <span class="py-output"></span><span class="py-prompt">>>> </span>u<span class="py-string">' '</span> + lazy_greeting <span class="py-output">u' Hello, Joe!'</span> <span class="py-output"></span><span class="py-prompt">>>> </span>u<span class="py-string">'(%s)'</span> % lazy_greeting <span class="py-output">u'(Hello, Joe!)'</span></pre> <p>This can be used, for example, to implement lazy translation functions that delay the actual translation until the string is actually used. The rationale for such behavior is that the locale of the user may not always be available. In web applications, you only know the locale when processing a request.</p> <p>The proxy implementation attempts to be as complete as possible, so that the lazy objects should mostly work as expected, for example for sorting:</p> <pre class="py-doctest"> <span class="py-prompt">>>> </span>greetings = [ <span class="py-more">... </span> LazyProxy(greeting, <span class="py-string">'world'</span>), <span class="py-more">... </span> LazyProxy(greeting, <span class="py-string">'Joe'</span>), <span class="py-more">... </span> LazyProxy(greeting, <span class="py-string">'universe'</span>), <span class="py-more">... </span>] <span class="py-prompt">>>> </span>greetings.sort() <span class="py-prompt">>>> </span><span class="py-keyword">for</span> greeting <span class="py-keyword">in</span> greetings: <span class="py-more">... </span> <span class="py-keyword">print</span> greeting <span class="py-output">Hello, Joe!</span> <span class="py-output">Hello, universe!</span> <span class="py-output">Hello, world!</span></pre> <!-- ==================== INSTANCE METHODS ==================== --> <a name="section-InstanceMethods"></a> <table class="summary" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white"> <tr bgcolor="#70b0f0" class="table-header"> <td align="left" colspan="2" class="table-header"> <span class="table-header">Instance Methods</span></td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a href="babel.support.LazyProxy-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">func</span>, <span class="summary-sig-arg">*args</span>, <span class="summary-sig-arg">**kwargs</span>)</span><br /> x.__init__(...) initializes x; see x.__class__.__doc__ for signature</td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__contains__"></a><span class="summary-sig-name">__contains__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">key</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__nonzero__"></a><span class="summary-sig-name">__nonzero__</span>(<span class="summary-sig-arg">self</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__dir__"></a><span class="summary-sig-name">__dir__</span>(<span class="summary-sig-arg">self</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__iter__"></a><span class="summary-sig-name">__iter__</span>(<span class="summary-sig-arg">self</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__len__"></a><span class="summary-sig-name">__len__</span>(<span class="summary-sig-arg">self</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a href="babel.support.LazyProxy-class.html#__str__" class="summary-sig-name">__str__</a>(<span class="summary-sig-arg">self</span>)</span><br /> str(x)</td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__unicode__"></a><span class="summary-sig-name">__unicode__</span>(<span class="summary-sig-arg">self</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__add__"></a><span class="summary-sig-name">__add__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">other</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__radd__"></a><span class="summary-sig-name">__radd__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">other</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__mod__"></a><span class="summary-sig-name">__mod__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">other</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__rmod__"></a><span class="summary-sig-name">__rmod__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">other</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__mul__"></a><span class="summary-sig-name">__mul__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">other</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__rmul__"></a><span class="summary-sig-name">__rmul__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">other</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__call__"></a><span class="summary-sig-name">__call__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">*args</span>, <span class="summary-sig-arg">**kwargs</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__lt__"></a><span class="summary-sig-name">__lt__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">other</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__le__"></a><span class="summary-sig-name">__le__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">other</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__eq__"></a><span class="summary-sig-name">__eq__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">other</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__ne__"></a><span class="summary-sig-name">__ne__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">other</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__gt__"></a><span class="summary-sig-name">__gt__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">other</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__ge__"></a><span class="summary-sig-name">__ge__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">other</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a href="babel.support.LazyProxy-class.html#__delattr__" class="summary-sig-name">__delattr__</a>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">name</span>)</span><br /> x.__delattr__('name') <==> del x.name</td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__getattr__"></a><span class="summary-sig-name">__getattr__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">name</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a href="babel.support.LazyProxy-class.html#__setattr__" class="summary-sig-name">__setattr__</a>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">name</span>, <span class="summary-sig-arg">value</span>)</span><br /> x.__setattr__('name', value) <==> x.name = value</td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__delitem__"></a><span class="summary-sig-name">__delitem__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">key</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__getitem__"></a><span class="summary-sig-name">__getitem__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">key</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr> <td><span class="summary-sig"><a name="__setitem__"></a><span class="summary-sig-name">__setitem__</span>(<span class="summary-sig-arg">self</span>, <span class="summary-sig-arg">key</span>, <span class="summary-sig-arg">value</span>)</span></td> <td align="right" valign="top"> </td> </tr> </table> </td> </tr> <tr> <td colspan="2" class="summary"> <p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>: <code>__format__</code>, <code>__getattribute__</code>, <code>__hash__</code>, <code>__new__</code>, <code>__reduce__</code>, <code>__reduce_ex__</code>, <code>__repr__</code>, <code>__sizeof__</code>, <code>__subclasshook__</code> </p> </td> </tr> </table> <!-- ==================== PROPERTIES ==================== --> <a name="section-Properties"></a> <table class="summary" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white"> <tr bgcolor="#70b0f0" class="table-header"> <td align="left" colspan="2" class="table-header"> <span class="table-header">Properties</span></td> </tr> <tr> <td width="15%" align="right" valign="top" class="summary"> <span class="summary-type"> </span> </td><td class="summary"> <a href="babel.support.LazyProxy-class.html#value" class="summary-name">value</a> </td> </tr> <tr> <td colspan="2" class="summary"> <p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>: <code>__class__</code> </p> </td> </tr> </table> <!-- ==================== METHOD DETAILS ==================== --> <a name="section-MethodDetails"></a> <table class="details" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white"> <tr bgcolor="#70b0f0" class="table-header"> <td align="left" colspan="2" class="table-header"> <span class="table-header">Method Details</span></td> </tr> </table> <a name="__init__"></a> <div> <table class="details" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white"> <tr><td> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr valign="top"><td> <h3 class="epydoc"><span class="sig"><span class="sig-name">__init__</span>(<span class="sig-arg">self</span>, <span class="sig-arg">func</span>, <span class="sig-arg">*args</span>, <span class="sig-arg">**kwargs</span>)</span> <br /><em class="fname">(Constructor)</em> </h3> </td><td align="right" valign="top" > </td> </tr></table> x.__init__(...) initializes x; see x.__class__.__doc__ for signature <dl class="fields"> <dt>Overrides: object.__init__ <dd><em class="note">(inherited documentation)</em></dd> </dt> </dl> </td></tr></table> </div> <a name="__str__"></a> <div> <table class="details" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white"> <tr><td> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr valign="top"><td> <h3 class="epydoc"><span class="sig"><span class="sig-name">__str__</span>(<span class="sig-arg">self</span>)</span> <br /><em class="fname">(Informal representation operator)</em> </h3> </td><td align="right" valign="top" > </td> </tr></table> str(x) <dl class="fields"> <dt>Overrides: object.__str__ <dd><em class="note">(inherited documentation)</em></dd> </dt> </dl> </td></tr></table> </div> <a name="__delattr__"></a> <div> <table class="details" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white"> <tr><td> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr valign="top"><td> <h3 class="epydoc"><span class="sig"><span class="sig-name">__delattr__</span>(<span class="sig-arg">self</span>, <span class="sig-arg">name</span>)</span> </h3> </td><td align="right" valign="top" > </td> </tr></table> x.__delattr__('name') <==> del x.name <dl class="fields"> <dt>Overrides: object.__delattr__ <dd><em class="note">(inherited documentation)</em></dd> </dt> </dl> </td></tr></table> </div> <a name="__setattr__"></a> <div> <table class="details" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white"> <tr><td> <table width="100%" cellpadding="0" cellspacing="0" border="0"> <tr valign="top"><td> <h3 class="epydoc"><span class="sig"><span class="sig-name">__setattr__</span>(<span class="sig-arg">self</span>, <span class="sig-arg">name</span>, <span class="sig-arg">value</span>)</span> </h3> </td><td align="right" valign="top" > </td> </tr></table> x.__setattr__('name', value) <==> x.name = value <dl class="fields"> <dt>Overrides: object.__setattr__ <dd><em class="note">(inherited documentation)</em></dd> </dt> </dl> </td></tr></table> </div> <br /> <!-- ==================== PROPERTY DETAILS ==================== --> <a name="section-PropertyDetails"></a> <table class="details" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white"> <tr bgcolor="#70b0f0" class="table-header"> <td align="left" colspan="2" class="table-header"> <span class="table-header">Property Details</span></td> </tr> </table> <a name="value"></a> <div> <table class="details" border="1" cellpadding="3" cellspacing="0" width="100%" bgcolor="white"> <tr><td> <h3 class="epydoc">value</h3> <dl class="fields"> <dt>Get Method:</dt> <dd class="value"><span class="summary-sig"><i>unreachable</i>.value(<span class="summary-sig-arg">self</span>)</span> </dd> </dl> </td></tr></table> </div> <br /> <!-- ==================== NAVIGATION BAR ==================== --> <table class="navbar" border="0" width="100%" cellpadding="0" bgcolor="#a0c0ff" cellspacing="0"> <tr valign="middle"> <!-- Home link --> <th> <a href="babel-module.html">Home</a> </th> <!-- Tree link --> <th> <a href="module-tree.html">Trees</a> </th> <!-- Index link --> <th> <a href="identifier-index.html">Indices</a> </th> <!-- Help link --> <th> <a href="help.html">Help</a> </th> <!-- Project homepage --> <th class="navbar" align="right" width="100%"> <table border="0" cellpadding="0" cellspacing="0"> <tr><th class="navbar" align="center" ><a class="navbar" target="_top" href="../index.html">Documentation Index</a></th> </tr></table></th> </tr> </table> <table border="0" cellpadding="0" cellspacing="0" width="100%%"> <tr> <td align="left" class="footer"> 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