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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<head>
<title>The Python X Library: 4.1 X Error Classes</title>
<meta name="description" content="The Python X Library: 4.1 X Error Classes">
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<a name="X-Error-Classes"></a>
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<hr>
<a name="X-Error-Classes-1"></a>
<h2 class="section">4.1 X Error Classes</h2>
<p>X errors are structured in the following class hierarchy:
</p>
<div class="example">
<pre class="example">Exception
\_ error.XError
\_ error.BadRequest
\_ error.BadValue
\_ error.BadAtom
\_ error.BadMatch
\_ error.BadAccess
\_ error.BadAlloc
\_ error.BadName
\_ error.BadLength
\_ error.BadImplementation
\_ error.XResourceError
\_ error.BadWindow
\_ error.BadPixmap
\_ error.BadCursor
\_ error.BadFont
\_ error.BadDrawable
\_ error.BadColor
\_ error.BadGC
\_ error.BadIDChoice
</pre></div>
<p>All error objects has the following attributes:
</p>
<dl compact="compact">
<dt><code>code</code></dt>
<dd>
<p>The numeric error code
</p>
</dd>
<dt><code>sequence_number</code></dt>
<dd>
<p>The sequence number of the failed request
</p>
</dd>
<dt><code>resource_id</code></dt>
<dd>
<p>The bad resource id. For all the <code>error.XResourceError</code> this is a
X resource object. For the other errors it is an integer, which for
some errors might have no meaning
</p>
</dd>
<dt><code>major_opcode</code></dt>
<dd>
<p>The major opcode for the failed request
</p>
</dd>
<dt><code>minor_opcode</code></dt>
<dd>
<p>The minor opcode for the failed request. This will be zero for all base
X11R6 request, but will be interesting for extension requests
</p>
</dd>
</dl>
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