how to create a list of lists using list comprehension

Question

I want to create a list of lists using list comprehension. ex [range(3),range(3),range(3)] i.e all possible coordinates of a 3d system from 0 to 3 How to do this using only list comprehension and nothing else

I tried doing

coordinates=[x for x in range(3)[y for y in range(3)[z for z in range(3)]]]

What have you tried so far? Show your current code and where you're having the problem, and then state what the problem is. — Matt Hogan-Jones, Mar 29 '17 at 11:43
Possible duplicate of [Combination of 1 and 0 in an array in Python](http://stackoverflow.com/questions/24609919/combination-of-1-and-0-in-an-array-in-python) — dot.Py, Mar 29 '17 at 11:43

score 4 · Answer 1 · edited Mar 30 '17 at 14:14

4

your syntax is slightly off

coordinates=[[x,y,z] for x in range(4) for y in range(4) for z in range(4)]

edited Mar 30 '17 at 14:14

jfs

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answered Mar 29 '17 at 12:43

R-4

75
4

`coordinates = list(map(list, itertools.product(range(4), repeat=3)))` – jfs Mar 30 '17 at 14:13

score 2 · Answer 2 · answered Mar 29 '17 at 11:52

2

[[n,d,e] for e in [0,1,1] for d in [0,0,0] for n in [1,1,1]]

Output:

[[1, 0, 0],
[1, 0, 0],
[1, 0, 0],
[1, 0, 0],
[1, 0, 0],
[1, 0, 0],
<..>

Change/add variables and source lists as needed.

answered Mar 29 '17 at 11:52

danny

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how to create a list of lists using list comprehension

2 Answers2