Udacity goes live
I'm a little curious about some of the style choices in python code.  For example:    # used by Sebastian
    for k in range(len(measurements)):
        p = sense(p, measurements[k])

vs    # shorter, saner, and more Pythonic
    for m in measurements:
        p = sense(p, m)


I guess the old aphorism applies: a good Pascal programmer can write Pascal in any language.  (Not to criticize Sebastian's programming ability, only to wonder about the pedagogical choice.)