In this part we will take a look at the
concepts behind BlackAdder, Python and Qt. After a short
introduction, we will begin an in-depth investigation of the
core concept of PyQt: signals and slots. String handling and
object creation are the topics of the next two chapters. The
basic layout of the Qt class library will be explored,
illustrated with trivial and not-so-trivial examples. Finally,
we explain how to create GUI designs using the designer
module.