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+<h2><a name="abstract">Abstract</a></h2>
+<p>
+Abstract classes are used as base classes. You cannot create
+an instance of an abstract class directly - you need to subclass
+it. In the subclass, you need to overload <i>all</i> of the
+class's <a href="#purevirtual">pure virtual</a> methods. These
+are marked as "pure virtual" in these docs, and are also indicated
+by a " = 0" at the end of the method declaration.
+</p>
+<p>
+If your subclass doesn't overload the pure virtual methods in the
+abstract base class, you won't be able to create an instance of it.
+</p>
+
+<h2><a name="purevirtual">pure virtual</a></h2>
+<p>
+Pure virtual methods are members of an <a href="#abstract">abstract</a>
+class (they're what makes the class abstract in the first place). Pure
+virtual methods are nothing more than place holders - there is no code
+associated with them
+</p>
+
+
+<h2><a name="variables">variables</a></h2>
+<p>
+Class variables can be read and written from Python. Global or static
+variables are <i>read only</i>. Variables that are "protected" or.
+"private" in C++ are not implemented.
+</p>
+
+<h2><a name="slots">slots</a></h2>
+<p>
+When using Qt or KDE in C++, methods involving connections to slots
+take 2 arguments: a QObject 'receiver' and a char* 'slot' name. In Python
+you only need to provide a single value - the name of a Python callable
+method or function which will be connected to a signal. The method or
+function does not need to be in the class where it is reference, and does
+not have to be in a class at all. There are other options - see the
+"Signals and Slots" documentation for more information.
+</p>