[EMAIL PROTECTED] wrote:
On Nov 11, 7:48 pm, [EMAIL PROTECTED] wrote:
gc_ott:
How do I change the value of any element to produce (say)
[[99,0,0],[0,0,0],[0,0,0]] ?
gordc
To create a 2D list, that is a list of lists:
x = [[0] * ncols for i in nrows]
(Don't do what you were doing, because you end with many references to
the same list, and that will give you troubles.)
To set an item you do just:
x[0][0] = 99
Bye,
bearophile
Many thanks, I don't think I would ever 'discovered' this.
If you are trying to emulate numerical arrays, you may want to use numpy,
instead.
http://numpy.scipy.org/
import numpy
x = numpy.zeros([3,3], dtype=int)
x[0,0] = 99
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco
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