Lists inside dictionary and how to look for particular value

[mm0fmf]

On 26/01/2014 20:28, mick verdu wrote:
> I have programming course and trying to learn things. This is of no human use. I am just following exercises. Just have to do steps as asked.
>

A slightly OT observation... Mick, consider using more meaningful names 
than t,z etc. You know what they stand for now and you will remember 
them whilst you work on this task. But if you revisit the code in a few 
weeks, months etc. you'll have a hard job remembering what they stood for.