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        <a href="lxml-module.html">Package&nbsp;lxml</a> ::
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        Class&nbsp;ElementDepthFirstIterator
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<h1 class="epydoc">Class ElementDepthFirstIterator</h1><p class="nomargin-top"></p>
<pre class="base-tree">
object --+
         |
        <strong class="uidshort">ElementDepthFirstIterator</strong>
</pre>

<hr />
<p>ElementDepthFirstIterator(self, node, tag=None, inclusive=True)
Iterates over an element and its sub-elements in document order (depth
first pre-order).</p>
<p>Note that this also includes comments, entities and processing
instructions.  To filter them out, check if the <tt class="rst-docutils literal">tag</tt> property
of the returned element is a string (i.e. not None and not a
factory function), or pass the <tt class="rst-docutils literal">Element</tt> factory for the <tt class="rst-docutils literal">tag</tt>
argument to receive only Elements.</p>
<p>If the optional <tt class="rst-docutils literal">tag</tt> argument is not None, the iterator returns only
the elements that match the respective name and namespace.</p>
<p>The optional boolean argument 'inclusive' defaults to True and can be set
to False to exclude the start element itself.</p>
<p>Note that the behaviour of this iterator is completely undefined if the
tree it traverses is modified during iteration.</p>

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