How do I create many matrices inside a loop statement with python?

Question

I want to create for example n matrices like:

m1 = [[0,0],[0,0]]
m2 = [[0,0],[0,0]]
.
.    
mn = [[0,0],[0,0]]

possible duplicate of [How to create nested lists in python?](http://stackoverflow.com/questions/2173087/how-to-create-nested-lists-in-python) — TigerhawkT3, Jul 22 '15 at 17:31
That'll create `list`s of `[0, 1]`, not `[0, 0]`. It also has the wrong dimensions (10x2 instead of nx2x2). — TigerhawkT3, Jul 22 '15 at 17:36

score 2 · Accepted Answer · answered Jul 22 '15 at 17:42

I think that will work for you

res = [[[0 for item3 in range(2)] for item2 in range(2)] for item1 in range(10)]
print res

Output:

[
 [[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, 0]],
 [[0, 0], [0, 0]],
 [[0, 0], [0, 0]],
 [[0, 0], [0, 0]]
]

Basically 10(your n value) arrays with 2x2 lists of zeros.

How do I create many matrices inside a loop statement with python?

1 Answers1