[Numpy-discussion] For loop tips

[Alan G Isaac]

You can get some speed up for numeric data:
def list2index2(L):
  aL = asarray(L)
  eL = empty_like(L)
  for v,k in enumerate(set(L)):
  	eL[aL == k] = v
  return numpy.asmatrix(eL).T

fwiw,
Alan Isaac