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<?xml version="1.0" encoding="ascii"?>
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<span class="breadcrumbs">
<a href="netaddr-module.html">Package netaddr</a> ::
<a href="netaddr.strategy-module.html" onclick="show_private();">Module strategy</a> ::
Class IPv4StrategyOpt
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class IPv4StrategyOpt</h1><p class="nomargin-top"><span class="codelink"><a href="netaddr.strategy-pysrc.html#IPv4StrategyOpt">source code</a></span></p>
<pre class="base-tree">
object --+
|
<a href="netaddr.strategy.AddrStrategy-class.html">AddrStrategy</a> --+
|
<a href="netaddr.strategy.IPv4StrategyStd-class.html">IPv4StrategyStd</a> --+
|
<strong class="uidshort">IPv4StrategyOpt</strong>
</pre>
<hr />
<p>An optimised <a href="netaddr.strategy.AddrStrategy-class.html"
class="link">AddrStrategy</a> for IPv4 addresses.</p>
<p>It uses <code>pack()</code> and <code>unpack()</code> from the
<code>struct</code> module along with the <code>inet_ntoa()</code> and
<code>inet_aton()</code> from the <code>socket</code> module great
improve the speed of certain operations (approx. 2.5 times faster than a
standard <a href="netaddr.strategy.AddrStrategy-class.html"
class="link">AddrStrategy</a> configured for IPv4).</p>
<p>However, keep in mind that these modules might not be available
everywhere that Python itself is. Runtimes such as Google App Engine gut
the <code>socket</code> module. <code>struct</code> is also limited to
processing 32-bit integers which is fine for IPv4 but isn't suitable for
IPv6.</p>
<!-- ==================== 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">
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<tr>
<td><span class="summary-sig"><a href="netaddr.strategy.IPv4StrategyOpt-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">self</span>)</span><br />
Constructor.</td>
<td align="right" valign="top">
<span class="codelink"><a href="netaddr.strategy-pysrc.html#IPv4StrategyOpt.__init__">source code</a></span>
</td>
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</td>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
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<tr>
<td><span class="summary-sig"><a href="netaddr.strategy.IPv4StrategyOpt-class.html#valid_str" class="summary-sig-name">valid_str</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">addr</span>)</span><br />
Returns:
<code>True</code> if network address in string form is valid for this
address type, <code>False</code> otherwise.</td>
<td align="right" valign="top">
<span class="codelink"><a href="netaddr.strategy-pysrc.html#IPv4StrategyOpt.valid_str">source code</a></span>
</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="netaddr.strategy.IPv4StrategyOpt-class.html#str_to_int" class="summary-sig-name">str_to_int</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">addr</span>)</span><br />
Returns:
A network byte order integer that is equivalent to value represented
by the IPv4 dotted decimal address string.</td>
<td align="right" valign="top">
<span class="codelink"><a href="netaddr.strategy-pysrc.html#IPv4StrategyOpt.str_to_int">source code</a></span>
</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="netaddr.strategy.IPv4StrategyOpt-class.html#int_to_str" class="summary-sig-name">int_to_str</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">int_val</span>)</span><br />
Returns:
An IPv4 dotted decimal address string that is equivalent to value
represented by a 32 bit integer in network byte order.</td>
<td align="right" valign="top">
<span class="codelink"><a href="netaddr.strategy-pysrc.html#IPv4StrategyOpt.int_to_str">source code</a></span>
</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="netaddr.strategy.IPv4StrategyOpt-class.html#int_to_words" class="summary-sig-name">int_to_words</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">int_val</span>,
<span class="summary-sig-arg">num_words</span>=<span class="summary-sig-default">None</span>,
<span class="summary-sig-arg">word_size</span>=<span class="summary-sig-default">None</span>)</span><br />
Returns:
An integer word (octet) sequence that is equivalent to value
represented by network byte order integer.</td>
<td align="right" valign="top">
<span class="codelink"><a href="netaddr.strategy-pysrc.html#IPv4StrategyOpt.int_to_words">source code</a></span>
</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="netaddr.strategy.IPv4StrategyOpt-class.html#words_to_int" class="summary-sig-name">words_to_int</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">octets</span>)</span><br />
Returns:
A network byte order integer that is equivalent to value represented
by word (octet) sequence.</td>
<td align="right" valign="top">
<span class="codelink"><a href="netaddr.strategy-pysrc.html#IPv4StrategyOpt.words_to_int">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td colspan="2" class="summary">
<p class="indent-wrapped-lines"><b>Inherited from <code><a href="netaddr.strategy.IPv4StrategyStd-class.html">IPv4StrategyStd</a></code></b>:
<code><a href="netaddr.strategy.IPv4StrategyStd-class.html#int_to_arpa">int_to_arpa</a></code>
</p>
<p class="indent-wrapped-lines"><b>Inherited from <code><a href="netaddr.strategy.AddrStrategy-class.html">AddrStrategy</a></code></b>:
<code><a href="netaddr.strategy.AddrStrategy-class.html#__repr__">__repr__</a></code>,
<code><a href="netaddr.strategy.AddrStrategy-class.html#bits_to_int">bits_to_int</a></code>,
<code><a href="netaddr.strategy.AddrStrategy-class.html#int_to_bin">int_to_bin</a></code>,
<code><a href="netaddr.strategy.AddrStrategy-class.html#int_to_bits">int_to_bits</a></code>,
<code><a href="netaddr.strategy.AddrStrategy-class.html#int_to_packed">int_to_packed</a></code>,
<code><a href="netaddr.strategy.AddrStrategy-class.html#packed_to_int">packed_to_int</a></code>,
<code><a href="netaddr.strategy.AddrStrategy-class.html#valid_bits">valid_bits</a></code>,
<code><a href="netaddr.strategy.AddrStrategy-class.html#valid_int">valid_int</a></code>,
<code><a href="netaddr.strategy.AddrStrategy-class.html#valid_words">valid_words</a></code>
</p>
<p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
<code>__delattr__</code>,
<code>__getattribute__</code>,
<code>__hash__</code>,
<code>__new__</code>,
<code>__reduce__</code>,
<code>__reduce_ex__</code>,
<code>__setattr__</code>,
<code>__str__</code>
</p>
</td>
</tr>
</table>
<!-- ==================== CLASS VARIABLES ==================== -->
<a name="section-ClassVariables"></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">Class Variables</span></td>
</tr>
<tr>
<td colspan="2" class="summary">
<p class="indent-wrapped-lines"><b>Inherited from <code><a href="netaddr.strategy.AddrStrategy-class.html">AddrStrategy</a></code></b>:
<code><a href="netaddr.strategy.AddrStrategy-class.html#STRUCT_FORMATS">STRUCT_FORMATS</a></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 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>
<br /><em class="fname">(Constructor)</em>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="netaddr.strategy-pysrc.html#IPv4StrategyOpt.__init__">source code</a></span>
</td>
</tr></table>
<p>Constructor.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>width</code></strong> - size of address in bits. (e.g. 32 - IPv4, 48 - MAC, 128 - IPv6)</li>
<li><strong class="pname"><code>word_size</code></strong> - size of each word. (e.g. 8 - octets, 16 - hextets)</li>
<li><strong class="pname"><code>word_sep</code></strong> - separator between each word. (e.g. '.' - IPv4, ':' - IPv6, '-' -
EUI-48)</li>
<li><strong class="pname"><code>word_fmt</code></strong> - format string for each word. (Default: '%x')</li>
<li><strong class="pname"><code>addr_type</code></strong> - address type. (Default: AT_UNSPEC)</li>
<li><strong class="pname"><code>word_base</code></strong> - number base used to convert each word using int(). (Default: 16)</li>
<li><strong class="pname"><code>uppercase</code></strong> - uppercase address. (Default: False)</li>
</ul></dd>
<dt>Overrides:
object.__init__
</dt>
</dl>
</td></tr></table>
</div>
<a name="valid_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">valid_str</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">addr</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="netaddr.strategy-pysrc.html#IPv4StrategyOpt.valid_str">source code</a></span>
</td>
</tr></table>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>addr</code></strong> - An IP address in presentation (string) format.</li>
</ul></dd>
<dt>Returns:</dt>
<dd><code>True</code> if network address in string form is valid for
this address type, <code>False</code> otherwise.</dd>
<dt>Overrides:
<a href="netaddr.strategy.AddrStrategy-class.html#valid_str">AddrStrategy.valid_str</a>
</dt>
</dl>
</td></tr></table>
</div>
<a name="str_to_int"></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_to_int</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">addr</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="netaddr.strategy-pysrc.html#IPv4StrategyOpt.str_to_int">source code</a></span>
</td>
</tr></table>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>addr</code></strong> - An IPv4 dotted decimal address in string form.</li>
</ul></dd>
<dt>Returns:</dt>
<dd>A network byte order integer that is equivalent to value
represented by the IPv4 dotted decimal address string.</dd>
<dt>Overrides:
<a href="netaddr.strategy.AddrStrategy-class.html#str_to_int">AddrStrategy.str_to_int</a>
</dt>
</dl>
</td></tr></table>
</div>
<a name="int_to_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">int_to_str</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">int_val</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="netaddr.strategy-pysrc.html#IPv4StrategyOpt.int_to_str">source code</a></span>
</td>
</tr></table>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>int_val</code></strong> - A network byte order integer.</li>
</ul></dd>
<dt>Returns:</dt>
<dd>An IPv4 dotted decimal address string that is equivalent to value
represented by a 32 bit integer in network byte order.</dd>
<dt>Overrides:
<a href="netaddr.strategy.AddrStrategy-class.html#int_to_str">AddrStrategy.int_to_str</a>
</dt>
</dl>
</td></tr></table>
</div>
<a name="int_to_words"></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">int_to_words</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">int_val</span>,
<span class="sig-arg">num_words</span>=<span class="sig-default">None</span>,
<span class="sig-arg">word_size</span>=<span class="sig-default">None</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="netaddr.strategy-pysrc.html#IPv4StrategyOpt.int_to_words">source code</a></span>
</td>
</tr></table>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>int_val</code></strong> - A network byte order integer.</li>
<li><strong class="pname"><code>num_words</code></strong> - (unused) *** interface compatibility only ***</li>
<li><strong class="pname"><code>word_size</code></strong> - (unused) *** interface compatibility only ***</li>
</ul></dd>
<dt>Returns:</dt>
<dd>An integer word (octet) sequence that is equivalent to value
represented by network byte order integer.</dd>
<dt>Overrides:
<a href="netaddr.strategy.AddrStrategy-class.html#int_to_words">AddrStrategy.int_to_words</a>
</dt>
</dl>
</td></tr></table>
</div>
<a name="words_to_int"></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">words_to_int</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">octets</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="netaddr.strategy-pysrc.html#IPv4StrategyOpt.words_to_int">source code</a></span>
</td>
</tr></table>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>octets</code></strong> - A list or tuple containing integer octets.</li>
</ul></dd>
<dt>Returns:</dt>
<dd>A network byte order integer that is equivalent to value
represented by word (octet) sequence.</dd>
<dt>Overrides:
<a href="netaddr.strategy.AddrStrategy-class.html#words_to_int">AddrStrategy.words_to_int</a>
</dt>
</dl>
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