Jill> How do I define a 2d list?
Python doesn't truly have 2d lists in the way you might think of 2d arrays
in C or Fortran. It has 1d lists which can contain any Python object,
including other lists. If you wanted to create a 4x5 list you'd do
something like this:
N = 4
M = 5
mylist = []
for i in range(N):
mylist.append([0.0] * M)
If you are looking to do numeric work with such multidimensional lists you
should consider the builtin array object or the numpy package:
http://docs.python.org/dev/library/array.html#module-array
http://numpy.scipy.org/
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