Few visualizations, prepared by Tomas Svoboda for a lecture in Problem solving and games series.

http://pythontutor.com employed. Students are encouraged to try their own code visualizations.

• Obory platnosti proměnných a konstant
• Floating point surprise. Check http://docs.python.org/3.2/tutorial/floatingpoint.html for more details, but don't worry too much ;-)
• strings, list of strings, for loops.
• pointers, essentials.
• own copy_vector. Read copy module description for more details.
• pure function vs. function modifier Don't misuse Python's great freedom.
• ComplexNumber class. A very simple class, introducing __add__
• simple class, one function. Global variables are evil!
• Dictionaries, essentials. Dictionaries (hash arrays) are mighty.
• Using implicit mutable object is perhaps not the best idea. See also a more detailed discussion.