In a PPL Program, use syntax <program>.<variable> shown below. In an App derived from the Python app, use AVars() as shown in the next section. The syntax <program>.<variable> is used to get or set a ...

IN DECEMBER 1989 Guido van Rossum, a Dutch computer scientist, set himself a Christmas project. Irked by shortcomings in other programming languages, he wanted to build his own. His principles ...