Python two dimensional list

Question

How do I create a two dimensional list so that when I input two values a, b (separeted by a comma) until I enter a empty row so that the list looks like this [[a, b], [c, d], [e, f]] with float values?

Edit: My desired input would be for example:

print(input x,y)

2.0,-1.0
3.0,8.0
-1.0,4.0
(empty row)

And then my desired output would be:

[[2.0, -1.0], [3.0, 8.0], [-1.0, 4.0]

And if the first input is an empty space it would print "No input"

What do you ask precisely? What is your desired input and output? Maybe update your post with that. — Chris Fowl, Oct 26 '18 at 13:18
Your question is not quite clear. If you give us an example, showing us the input and the desired output, that would help. You also should show us some of your own work on this problem, preferably including a code attempt. — Rory Daulton, Oct 26 '18 at 13:19

score 2 · Answer 1 · answered Oct 26 '18 at 13:19

2

You can use a list comprehension like this:

[[float(f) for f in l.split(',')] for l in iter(input, '')]

answered Oct 26 '18 at 13:19

blhsing

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Do you really want to answer a question that shows no example input or output and shows no work by the questioner? – Rory Daulton Oct 26 '18 at 13:20
I think the question itself is quite clear even without an example input or output. – blhsing Oct 26 '18 at 13:21
1

@RoryDaulton the answer is more of a punishment I think. :) – timgeb Oct 26 '18 at 13:24

Python two dimensional list

1 Answers1