True, I also found it odd that he would have expected the teacher to know python or ruby. I program for a living and I've only just started looking into python and I know virtually no ruby. Although I'm sure if I had some well documented code I could figure out what it does, but I guess GCSE teachers only get limited time for marking and in most cases have to do it from home.
One thing I enjoyed about my 3rd and 4th year university units is that they stopped imposing language requirements. Hand it in, if the professor can follow it, you get marked. Otherwise he or she will call you in and you can explain it in person.
