This year, the UK government encouraged supermarkets to display their fuel prices. The scheme is voluntary, and so far only ASDA has started displaying prices on its website. Since fuel prices vary from place to place, you must visit each supermarket’s website to find the best prices near you. To make this process easier, I wrote the following Python script:

A few weeks ago I introduced my students to the notion of dictionaries in python. The obvious way of teaching them, especially in the context of my module, is to use dictionaries to create word frequency lists. In order to make the students understand better why dictionaries are useful, we discussed other ways to produce frequency lists which use only lists. This prompted me to try to think as many ways as possible to produce frequency lists. I also wanted to see how feasible is to use these…