python 3d array like in C ++

Question

I'd like to make a 3 dimensional array like this one :

treedarray = [[[0, 0, 0], [0, 0, 0], [0, 0, 0]],
[[0, 0, 0], [0, 0, 0], [0, 0, 0]],
[[0, 0, 0], [0, 0, 0], [0, 0, 0]]]

in this table, every value is (easily) accessible by using :

treedarray [a] [b] [c]

I'd like to know if there is a command to do that more easily.

Thanks in advance.

You seem to be rather new to Python. Please check out Numpy. It's a package for numerical stuff, and provides everything you could wish for in a multidimensional array. There's basically no way around it if you want to do numericas in Python. (By the way, you could ger your array using numpy via treedarray = numpy.zeros((3, 3, 3))) — Carsten
– Carsten, Commented Nov 5, 2015 at 18:00

Shapi · Accepted Answer · 2015-11-05 18:32:42Z

1

Using Numpy and numpy.zeros() you can define the shape with a list of values as the first param. e.g.

import numpy as np

treedarray = np.zeros([3,3,3])
print treedarray

Outputs:

[[[ 0.  0.  0.]
  [ 0.  0.  0.]
  [ 0.  0.  0.]]

 [[ 0.  0.  0.]
  [ 0.  0.  0.]
  [ 0.  0.  0.]]

 [[ 0.  0.  0.]
  [ 0.  0.  0.]
  [ 0.  0.  0.]]]

And can access the pretended value using, treedarray[a][b][c].

answered Nov 5, 2015 at 18:19

Shapi

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