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<div class="section" id="module-waflib.ConfigSet">
<span id="configset"></span><h1>ConfigSet<a class="headerlink" href="#module-waflib.ConfigSet" title="Permalink to this headline">¶</a></h1>
<p>ConfigSet: a special dict</p>
<p>The values put in <a class="reference internal" href="#waflib.ConfigSet.ConfigSet" title="waflib.ConfigSet.ConfigSet"><tt class="xref py py-class docutils literal"><span class="pre">ConfigSet</span></tt></a> must be lists</p>
<dl class="class">
<dt id="waflib.ConfigSet.ConfigSet">
<em class="property">class </em><tt class="descclassname">waflib.ConfigSet.</tt><tt class="descname">ConfigSet</tt><big>(</big><em>filename=None</em><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <tt class="xref py py-class docutils literal"><span class="pre">object</span></tt></p>
<p>A dict that honor serialization and parent relationships. The serialization format
is human-readable (python-like) and performed by using eval() and repr().
For high performance prefer pickle. Do not store functions as they are not serializable.</p>
<p>The values can be accessed by attributes or by keys:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">waflib.ConfigSet</span> <span class="kn">import</span> <span class="n">ConfigSet</span>
<span class="n">env</span> <span class="o">=</span> <span class="n">ConfigSet</span><span class="p">()</span>
<span class="n">env</span><span class="o">.</span><span class="n">FOO</span> <span class="o">=</span> <span class="s">'test'</span>
<span class="n">env</span><span class="p">[</span><span class="s">'FOO'</span><span class="p">]</span> <span class="o">=</span> <span class="s">'test'</span>
</pre></div>
</div>
<dl class="attribute">
<dt id="waflib.ConfigSet.ConfigSet.__slots__">
<tt class="descname">__slots__</tt><em class="property"> = ('table', 'parent')</em><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.__slots__" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="attribute">
<dt id="waflib.ConfigSet.ConfigSet.table">
<tt class="descname">table</tt><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.table" title="Permalink to this definition">¶</a></dt>
<dd><p>Internal dict holding the object values</p>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.__contains__">
<tt class="descname">__contains__</tt><big>(</big><em>key</em><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.__contains__"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.__contains__" title="Permalink to this definition">¶</a></dt>
<dd><p>Enable the <em>in</em> syntax:</p>
<dl class="docutils">
<dt>if ‘foo’ in env:</dt>
<dd>print(env[‘foo’])</dd>
</dl>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.keys">
<tt class="descname">keys</tt><big>(</big><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.keys"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.keys" title="Permalink to this definition">¶</a></dt>
<dd><p>Dict interface (unknown purpose)</p>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.__str__">
<tt class="descname">__str__</tt><big>(</big><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.__str__"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.__str__" title="Permalink to this definition">¶</a></dt>
<dd><p>Text representation of the ConfigSet (for debugging purposes)</p>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.__getitem__">
<tt class="descname">__getitem__</tt><big>(</big><em>key</em><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.__getitem__"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.__getitem__" title="Permalink to this definition">¶</a></dt>
<dd><p>Dictionary interface: get value from key:</p>
<dl class="docutils">
<dt>def configure(conf):</dt>
<dd>conf.env[‘foo’] = {}
print(env[‘foo’])</dd>
</dl>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.__setitem__">
<tt class="descname">__setitem__</tt><big>(</big><em>key</em>, <em>value</em><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.__setitem__"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.__setitem__" title="Permalink to this definition">¶</a></dt>
<dd><p>Dictionary interface: get value from key</p>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.__delitem__">
<tt class="descname">__delitem__</tt><big>(</big><em>key</em><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.__delitem__"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.__delitem__" title="Permalink to this definition">¶</a></dt>
<dd><p>Dictionary interface: get value from key</p>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.__getattr__">
<tt class="descname">__getattr__</tt><big>(</big><em>name</em><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.__getattr__"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.__getattr__" title="Permalink to this definition">¶</a></dt>
<dd><p>Attribute access provided for convenience. The following forms are equivalent:</p>
<dl class="docutils">
<dt>def configure(conf):</dt>
<dd>conf.env.value
conf.env[‘value’]</dd>
</dl>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.__setattr__">
<tt class="descname">__setattr__</tt><big>(</big><em>name</em>, <em>value</em><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.__setattr__"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.__setattr__" title="Permalink to this definition">¶</a></dt>
<dd><p>Attribute access provided for convenience. The following forms are equivalent:</p>
<dl class="docutils">
<dt>def configure(conf):</dt>
<dd>conf.env.value = x
env[‘value’] = x</dd>
</dl>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.__delattr__">
<tt class="descname">__delattr__</tt><big>(</big><em>name</em><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.__delattr__"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.__delattr__" title="Permalink to this definition">¶</a></dt>
<dd><p>Attribute access provided for convenience. The following forms are equivalent:</p>
<dl class="docutils">
<dt>def configure(conf):</dt>
<dd>del env.value
del env[‘value’]</dd>
</dl>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.derive">
<tt class="descname">derive</tt><big>(</big><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.derive"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.derive" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns a new ConfigSet deriving from self. The copy returned
will be a shallow copy:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">waflib.ConfigSet</span> <span class="kn">import</span> <span class="n">ConfigSet</span>
<span class="n">env</span> <span class="o">=</span> <span class="n">ConfigSet</span><span class="p">()</span>
<span class="n">env</span><span class="o">.</span><span class="n">append_value</span><span class="p">(</span><span class="s">'CFLAGS'</span><span class="p">,</span> <span class="p">[</span><span class="s">'-O2'</span><span class="p">])</span>
<span class="n">child</span> <span class="o">=</span> <span class="n">env</span><span class="o">.</span><span class="n">derive</span><span class="p">()</span>
<span class="n">child</span><span class="o">.</span><span class="n">CFLAGS</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s">'test'</span><span class="p">)</span> <span class="c"># warning! this will modify 'env'</span>
<span class="n">child</span><span class="o">.</span><span class="n">CFLAGS</span> <span class="o">=</span> <span class="p">[</span><span class="s">'-O3'</span><span class="p">]</span> <span class="c"># new list, ok</span>
<span class="n">child</span><span class="o">.</span><span class="n">append_value</span><span class="p">(</span><span class="s">'CFLAGS'</span><span class="p">,</span> <span class="p">[</span><span class="s">'-O3'</span><span class="p">])</span> <span class="c"># ok</span>
</pre></div>
</div>
<p>Use <a class="reference internal" href="#waflib.ConfigSet.ConfigSet.detach" title="waflib.ConfigSet.ConfigSet.detach"><tt class="xref py py-func docutils literal"><span class="pre">ConfigSet.detach()</span></tt></a> to detach the child from the parent.</p>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.detach">
<tt class="descname">detach</tt><big>(</big><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.detach"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.detach" title="Permalink to this definition">¶</a></dt>
<dd><p>Detach self from its parent (if existing)</p>
<p>Modifying the parent <a class="reference internal" href="#waflib.ConfigSet.ConfigSet" title="waflib.ConfigSet.ConfigSet"><tt class="xref py py-class docutils literal"><span class="pre">ConfigSet</span></tt></a> will not change the current object
Modifying this <a class="reference internal" href="#waflib.ConfigSet.ConfigSet" title="waflib.ConfigSet.ConfigSet"><tt class="xref py py-class docutils literal"><span class="pre">ConfigSet</span></tt></a> will not modify the parent one.</p>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.get_flat">
<tt class="descname">get_flat</tt><big>(</big><em>key</em><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.get_flat"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.get_flat" title="Permalink to this definition">¶</a></dt>
<dd><p>Return a value as a string. If the input is a list, the value returned is space-separated.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><strong>key</strong> (<em>string</em>) – key to use</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet._get_list_value_for_modification">
<tt class="descname">_get_list_value_for_modification</tt><big>(</big><em>key</em><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet._get_list_value_for_modification"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet._get_list_value_for_modification" title="Permalink to this definition">¶</a></dt>
<dd><p>Return a list value for further modification.</p>
<p>The list may be modified inplace and there is no need to do this afterwards:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="bp">self</span><span class="o">.</span><span class="n">table</span><span class="p">[</span><span class="n">var</span><span class="p">]</span> <span class="o">=</span> <span class="n">value</span>
</pre></div>
</div>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.append_value">
<tt class="descname">append_value</tt><big>(</big><em>var</em>, <em>val</em><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.append_value"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.append_value" title="Permalink to this definition">¶</a></dt>
<dd><p>Appends a value to the specified config key:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="k">def</span> <span class="nf">build</span><span class="p">(</span><span class="n">bld</span><span class="p">):</span>
<span class="n">bld</span><span class="o">.</span><span class="n">env</span><span class="o">.</span><span class="n">append_value</span><span class="p">(</span><span class="s">'CFLAGS'</span><span class="p">,</span> <span class="p">[</span><span class="s">'-O2'</span><span class="p">])</span>
</pre></div>
</div>
<p>The value must be a list or a tuple</p>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.prepend_value">
<tt class="descname">prepend_value</tt><big>(</big><em>var</em>, <em>val</em><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.prepend_value"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.prepend_value" title="Permalink to this definition">¶</a></dt>
<dd><p>Prepends a value to the specified item:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="k">def</span> <span class="nf">configure</span><span class="p">(</span><span class="n">conf</span><span class="p">):</span>
<span class="n">conf</span><span class="o">.</span><span class="n">env</span><span class="o">.</span><span class="n">prepend_value</span><span class="p">(</span><span class="s">'CFLAGS'</span><span class="p">,</span> <span class="p">[</span><span class="s">'-O2'</span><span class="p">])</span>
</pre></div>
</div>
<p>The value must be a list or a tuple</p>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.append_unique">
<tt class="descname">append_unique</tt><big>(</big><em>var</em>, <em>val</em><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.append_unique"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.append_unique" title="Permalink to this definition">¶</a></dt>
<dd><p>Append a value to the specified item only if it’s not already present:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="k">def</span> <span class="nf">build</span><span class="p">(</span><span class="n">bld</span><span class="p">):</span>
<span class="n">bld</span><span class="o">.</span><span class="n">env</span><span class="o">.</span><span class="n">append_unique</span><span class="p">(</span><span class="s">'CFLAGS'</span><span class="p">,</span> <span class="p">[</span><span class="s">'-O2'</span><span class="p">,</span> <span class="s">'-g'</span><span class="p">])</span>
</pre></div>
</div>
<p>The value must be a list or a tuple</p>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.get_merged_dict">
<tt class="descname">get_merged_dict</tt><big>(</big><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.get_merged_dict"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.get_merged_dict" title="Permalink to this definition">¶</a></dt>
<dd><p>Compute the merged dictionary from the fusion of self and all its parent</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body">a ConfigSet object</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.store">
<tt class="descname">store</tt><big>(</big><em>filename</em><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.store"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.store" title="Permalink to this definition">¶</a></dt>
<dd><p>Write the <a class="reference internal" href="#waflib.ConfigSet.ConfigSet" title="waflib.ConfigSet.ConfigSet"><tt class="xref py py-class docutils literal"><span class="pre">ConfigSet</span></tt></a> data into a file. See <a class="reference internal" href="#waflib.ConfigSet.ConfigSet.load" title="waflib.ConfigSet.ConfigSet.load"><tt class="xref py py-meth docutils literal"><span class="pre">ConfigSet.load()</span></tt></a> for reading such files.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><strong>filename</strong> (<em>string</em>) – file to use</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.load">
<tt class="descname">load</tt><big>(</big><em>filename</em><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.load"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.load" title="Permalink to this definition">¶</a></dt>
<dd><p>Retrieve the <a class="reference internal" href="#waflib.ConfigSet.ConfigSet" title="waflib.ConfigSet.ConfigSet"><tt class="xref py py-class docutils literal"><span class="pre">ConfigSet</span></tt></a> data from a file. See <a class="reference internal" href="#waflib.ConfigSet.ConfigSet.store" title="waflib.ConfigSet.ConfigSet.store"><tt class="xref py py-meth docutils literal"><span class="pre">ConfigSet.store()</span></tt></a> for writing such files</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><strong>filename</strong> (<em>string</em>) – file to use</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.update">
<tt class="descname">update</tt><big>(</big><em>d</em><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.update"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.update" title="Permalink to this definition">¶</a></dt>
<dd><p>Dictionary interface: replace values from another dict</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><strong>d</strong> (<em>dict-like object</em>) – object to use the value from</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.stash">
<tt class="descname">stash</tt><big>(</big><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.stash"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.stash" title="Permalink to this definition">¶</a></dt>
<dd><p>Store the object state, to provide a kind of transaction support:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="n">env</span> <span class="o">=</span> <span class="n">ConfigSet</span><span class="p">()</span>
<span class="n">env</span><span class="o">.</span><span class="n">stash</span><span class="p">()</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">env</span><span class="o">.</span><span class="n">append_value</span><span class="p">(</span><span class="s">'CFLAGS'</span><span class="p">,</span> <span class="s">'-O3'</span><span class="p">)</span>
<span class="n">call_some_method</span><span class="p">(</span><span class="n">env</span><span class="p">)</span>
<span class="k">finally</span><span class="p">:</span>
<span class="n">env</span><span class="o">.</span><span class="n">revert</span><span class="p">()</span>
</pre></div>
</div>
<p>The history is kept in a stack, and is lost during the serialization by <a class="reference internal" href="#waflib.ConfigSet.ConfigSet.store" title="waflib.ConfigSet.ConfigSet.store"><tt class="xref py py-meth docutils literal"><span class="pre">ConfigSet.store()</span></tt></a></p>
</dd></dl>
<dl class="attribute">
<dt id="waflib.ConfigSet.ConfigSet.__doc__">
<tt class="descname">__doc__</tt><em class="property"> = "\n\tA dict that honor serialization and parent relationships. The serialization format\n\tis human-readable (python-like) and performed by using eval() and repr().\n\tFor high performance prefer pickle. Do not store functions as they are not serializable.\n\n\tThe values can be accessed by attributes or by keys::\n\n\t\tfrom waflib.ConfigSet import ConfigSet\n\t\tenv = ConfigSet()\n\t\tenv.FOO = 'test'\n\t\tenv['FOO'] = 'test'\n\t"</em><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.__doc__" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="attribute">
<dt id="waflib.ConfigSet.ConfigSet.__module__">
<tt class="descname">__module__</tt><em class="property"> = 'waflib.ConfigSet'</em><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.__module__" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="waflib.ConfigSet.ConfigSet.revert">
<tt class="descname">revert</tt><big>(</big><big>)</big><a class="reference internal" href="_modules/waflib/ConfigSet.html#ConfigSet.revert"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#waflib.ConfigSet.ConfigSet.revert" title="Permalink to this definition">¶</a></dt>
<dd><p>Reverts the object to a previous state. See <a class="reference internal" href="#waflib.ConfigSet.ConfigSet.stash" title="waflib.ConfigSet.ConfigSet.stash"><tt class="xref py py-meth docutils literal"><span class="pre">ConfigSet.stash()</span></tt></a></p>
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