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  <div class="section" id="pyqt4-reference-guide">
<h1>PyQt4 Reference Guide<a class="headerlink" href="#pyqt4-reference-guide" title="Permalink to this headline">¶</a></h1>
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<li class="toctree-l1"><a class="reference internal" href="introduction.html">Introduction</a><ul>
<li class="toctree-l2"><a class="reference internal" href="introduction.html#license">License</a></li>
<li class="toctree-l2"><a class="reference internal" href="introduction.html#pyqt4-components">PyQt4 Components</a></li>
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<li class="toctree-l2"><a class="reference internal" href="incompatibilities.html#pyqt4-v4-12">PyQt4 v4.12</a></li>
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<li class="toctree-l1"><a class="reference internal" href="installation.html">Installing PyQt4</a><ul>
<li class="toctree-l2"><a class="reference internal" href="installation.html#downloading-sip">Downloading SIP</a></li>
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<li class="toctree-l2"><a class="reference internal" href="installation.html#configuring-pyqt4">Configuring PyQt4</a></li>
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<li class="toctree-l1"><a class="reference internal" href="python_v3.html">PyQt4 and Python v3</a><ul>
<li class="toctree-l2"><a class="reference internal" href="python_v3.html#qabstractspinbox">QAbstractSpinBox</a></li>
<li class="toctree-l2"><a class="reference internal" href="python_v3.html#qchar">QChar</a></li>
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<li class="toctree-l1"><a class="reference internal" href="qt_v5.html">PyQt4 and Qt v5</a><ul>
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<li class="toctree-l1"><a class="reference internal" href="keyword_arguments.html">Support for Keyword Arguments</a></li>
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<li class="toctree-l2"><a class="reference internal" href="qt_properties.html#defining-new-qt-properties">Defining New Qt Properties</a></li>
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<li class="toctree-l1"><a class="reference internal" href="new_style_signals_slots.html">New-style Signal and Slot Support</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="new_style_signals_slots.html#defining-new-signals-with-pyqtsignal">Defining New Signals with <code class="docutils literal"><span class="pre">pyqtSignal()</span></code></a></li>
<li class="toctree-l2"><a class="reference internal" href="new_style_signals_slots.html#connecting-disconnecting-and-emitting-signals">Connecting, Disconnecting and Emitting Signals</a></li>
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<li class="toctree-l2"><a class="reference internal" href="new_style_signals_slots.html#the-pyqtslot-decorator">The <code class="docutils literal"><span class="pre">pyqtSlot()</span></code> Decorator</a></li>
<li class="toctree-l2"><a class="reference internal" href="new_style_signals_slots.html#the-pyqt-pyobject-signal-argument-type">The <code class="docutils literal"><span class="pre">PyQt_PyObject</span></code> Signal Argument Type</a></li>
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<li class="toctree-l2"><a class="reference internal" href="new_style_signals_slots.html#mixing-new-style-and-old-style-connections">Mixing New-style and Old-style Connections</a></li>
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<li class="toctree-l1"><a class="reference internal" href="old_style_signals_slots.html">Old-style Signal and Slot Support</a><ul>
<li class="toctree-l2"><a class="reference internal" href="old_style_signals_slots.html#pyqt4-signals-and-qt-signals">PyQt4 Signals and Qt Signals</a></li>
<li class="toctree-l2"><a class="reference internal" href="old_style_signals_slots.html#the-pyqt-pyobject-signal-argument-type">The <code class="docutils literal"><span class="pre">PyQt_PyObject</span></code> Signal Argument Type</a></li>
<li class="toctree-l2"><a class="reference internal" href="old_style_signals_slots.html#short-circuit-signals">Short-circuit Signals</a></li>
<li class="toctree-l2"><a class="reference internal" href="old_style_signals_slots.html#pyqt4-slots-and-qt-slots">PyQt4 Slots and Qt Slots</a></li>
<li class="toctree-l2"><a class="reference internal" href="old_style_signals_slots.html#connecting-signals-and-slots">Connecting Signals and Slots</a></li>
<li class="toctree-l2"><a class="reference internal" href="old_style_signals_slots.html#emitting-signals">Emitting Signals</a></li>
<li class="toctree-l2"><a class="reference internal" href="old_style_signals_slots.html#the-qtcore-pyqtsignature-decorator">The <code class="docutils literal"><span class="pre">QtCore.pyqtSignature()</span></code> Decorator</a></li>
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<li class="toctree-l1"><a class="reference internal" href="gotchas.html">Things to be Aware Of</a><ul>
<li class="toctree-l2"><a class="reference internal" href="gotchas.html#python-strings-qt-strings-and-unicode">Python Strings, Qt Strings and Unicode</a></li>
<li class="toctree-l2"><a class="reference internal" href="gotchas.html#garbage-collection">Garbage Collection</a></li>
<li class="toctree-l2"><a class="reference internal" href="gotchas.html#multiple-inheritance">Multiple Inheritance</a></li>
<li class="toctree-l2"><a class="reference internal" href="gotchas.html#access-to-protected-member-functions">Access to Protected Member Functions</a></li>
<li class="toctree-l2"><a class="reference internal" href="gotchas.html#none-and-null"><code class="docutils literal"><span class="pre">None</span></code> and <code class="docutils literal"><span class="pre">NULL</span></code></a></li>
<li class="toctree-l2"><a class="reference internal" href="gotchas.html#support-for-void">Support for <code class="docutils literal"><span class="pre">void</span> <span class="pre">*</span></code></a></li>
<li class="toctree-l2"><a class="reference internal" href="gotchas.html#super-and-pyqt4-classes"><code class="docutils literal"><span class="pre">super</span></code> and PyQt4 Classes</a></li>
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<li class="toctree-l1"><a class="reference internal" href="designer.html">Using Qt Designer</a><ul>
<li class="toctree-l2"><a class="reference internal" href="designer.html#using-the-generated-code">Using the Generated Code</a></li>
<li class="toctree-l2"><a class="reference internal" href="designer.html#the-uic-module">The <code class="docutils literal"><span class="pre">uic</span></code> Module</a></li>
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<li class="toctree-l2"><a class="reference internal" href="designer.html#writing-qt-designer-plugins">Writing Qt Designer Plugins</a></li>
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<li class="toctree-l1"><a class="reference internal" href="resources.html">The PyQt4 Resource System</a><ul>
<li class="toctree-l2"><a class="reference internal" href="resources.html#pyrcc4"><strong class="program">pyrcc4</strong></a></li>
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<li class="toctree-l1"><a class="reference internal" href="pyqt_qvariant.html">Python Objects and QVariant</a></li>
<li class="toctree-l1"><a class="reference internal" href="pyqt_qsettings.html">Support for QSettings</a></li>
<li class="toctree-l1"><a class="reference internal" href="qml.html">Integrating Python and QML</a></li>
<li class="toctree-l1"><a class="reference internal" href="webkit.html">Integrating Python and JavaScript in QtWebKit</a></li>
<li class="toctree-l1"><a class="reference internal" href="pickle.html">Support for Pickling</a></li>
<li class="toctree-l1"><a class="reference internal" href="buffer_interface.html">Support for Python’s Buffer Interface</a></li>
<li class="toctree-l1"><a class="reference internal" href="python_shell.html">Using PyQt4 from the Python Shell</a></li>
<li class="toctree-l1"><a class="reference internal" href="i18n.html">Internationalisation of PyQt4 Applications</a><ul>
<li class="toctree-l2"><a class="reference internal" href="i18n.html#pylupdate4"><strong class="program">pylupdate4</strong></a></li>
<li class="toctree-l2"><a class="reference internal" href="i18n.html#differences-between-pyqt4-and-qt">Differences Between PyQt4 and Qt</a></li>
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<li class="toctree-l1"><a class="reference internal" href="dbus.html">DBus Support</a><ul>
<li class="toctree-l2"><a class="reference internal" href="dbus.html#qtdbus"><code class="docutils literal"><span class="pre">QtDBus</span></code></a></li>
<li class="toctree-l2"><a class="reference internal" href="dbus.html#dbus-mainloop-qt"><code class="docutils literal"><span class="pre">dbus.mainloop.qt</span></code></a></li>
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<li class="toctree-l1"><a class="reference internal" href="incompatible_apis.html">Selecting Incompatible APIs</a></li>
<li class="toctree-l1"><a class="reference internal" href="deploy_commercial.html">Deploying Commercial PyQt4 Applications</a></li>
<li class="toctree-l1"><a class="reference internal" href="build_system.html">The PyQt4 Build System</a><ul>
<li class="toctree-l2"><a class="reference internal" href="build_system.html#the-old-build-system">The Old Build System</a></li>
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<li class="toctree-l1"><a class="reference internal" href="extension_api.html">The PyQt4 Extension API</a><ul>
<li class="toctree-l2"><a class="reference internal" href="extension_api.html#python-api">Python API</a></li>
<li class="toctree-l2"><a class="reference internal" href="extension_api.html#c-api">C++ API</a></li>
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