Tim spent a very long time in the early days of Python List teaching me all sorts of things I didn't know from my father's scattershot teaching as a child. He was generous with his time, full of humour and willing to teach some random kid on the internet when he had lots of other important things he could be doing.

Spending ages with him and Christian trying to optimise some random function to the Nth degree to work around Python's quirks is one of my fondest memories from that era of my life.