Parse string run time parameter to 2D list

Question

I'm need to pass a 2D list to my program via the command line like the following:

python myscript.py [[int,int,int],[int,int,int]]

I'm getting the run time param via sys.argv[1], but its interpreted as a string. I'm having a hard time converting it into a 2D list object.

voted to close my own question...i found the answer here: http://stackoverflow.com/questions/19723911/convert-a-string-2d-list-back-to-2d-list-in-python — , Dec 15 '16 at 17:41

score 1 · Answer 1 · answered Dec 15 '16 at 17:32

1

ast.literal_eval is what you need to look at.

In [7]: x = '[[1002763,201608,1],[1002763,201612,2]]'
In [9]: import ast

In [10]: ast.literal_eval(x)
Out[10]: [[1002763, 201608, 1], [1002763, 201612, 2]]

In [11]: ast.literal_eval(x)[1]
Out[11]: [1002763, 201612, 2]

In [12]: ast.literal_eval(x)[1][2]
Out[12]: 2

answered Dec 15 '16 at 17:32

harshil9968

3,254
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yup, just figured it out before you posted. Thanks tho! – Dec 15 '16 at 17:34
kindly accept and upvote. – harshil9968 Dec 15 '16 at 17:35
1

upvoted, but because i found the answer before your post in an already posted answer, i won't mark as accepted – Dec 15 '16 at 20:54

Atul Rokade · Answer 2 · 2016-12-15T18:02:56.843

0

Simplest way to do this (Assuming that you are giving valid string as a input)

x=sys.argv[1] 

list_2D=[i.split(",") for i in x[2:-2].split("],[")]

print list_2D

Output:

[['1002763', '201608', '1'], ['1002763', '201612', '2']]

edited Dec 15 '16 at 18:02

answered Dec 15 '16 at 17:57

Atul Rokade

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1
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Parse string run time parameter to 2D list

2 Answers2