python: convert “5,4,2,4,1,0” into [[5, 4], [2, 4], [1, 0]]

Question

Is there a \"straightforward\" way to convert a str containing numbers into a list of [x,y] ints?

# from: \'5,4,2,4,1,0,3,0,5,1,3,3,14,32,3,5\'
# to: [[5, 4         


        

Answer 1

First, use split to make a list of numbers (as in all of the other answers).

num_list = num_str.split(",")

Then, convert to integers:

num_list = [int(i) for i in num_list]

Then, use the itertools groupby recipe:

from itertools import izip_longest
def grouper(n, iterable, fillvalue=None):
   "grouper(3, 'ABCDEFG', 'x') --> ABC DEF Gxx"
   args = [iter(iterable)] * n
   return izip_longest(fillvalue=fillvalue, *args)

pair_list = grouper(2, num_list)

Of course, you can compress this into a single line if you're frugal:

pair_list = grouper(2, [int(i) for i in num_str.split(",")]