def label(length=None):

   first = random.choice(alpha)
   rest = [random.choice(alphaDigit) for i in xrange(length or 7)]
   newLabel = first + ''.join(rest)
   return newLabel
Return one of 183,123,959,522,816 possible labels.
dataset/ETHPy150Open twisted/nevow/examples/image_uploader/imagination.py/label