Retriving index value of an array in Python

Question

I am having a 2D array.

grid[0][0]= hat
grid[0][1]= cat
grid[1][1]= bat

Now, if I have the value cat, could I retrieve those index i.e [0][1]

Are you looking for something to search for a specific value's position in the array? — René Hoffmann
– René Hoffmann, Commented Aug 26, 2015 at 7:33
@Jenny If you like my answer, you should accept this. Just click left side and accept. you will also get some point — Sakib Ahammed
– Sakib Ahammed, Commented Aug 26, 2015 at 7:45

darkryder · Accepted Answer · 2015-08-26 07:15:08Z

1

You could iterate over all the elements like this:

def find(needle, hay):
  for x in hay:
    for y in x:
      if hay[x][y] == needle: return x, y
  return -1, -1

And then use this function

find('cat', grid)

answered Aug 26, 2015 at 7:15

darkryder

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1 Comment

Jenny Over a year ago

I am declaring my multidimensional array this way grid=[[0 for x in range(5)] for x in range(5)] On calling find() it is throwing this error: TypeError: list indices must be integers, not list

Sakib Ahammed · Accepted Answer · 2015-08-26 07:16:10Z

1

Yes. you can do by

for i in grid:
    for j in i:
        if grid[i][j] == 'cat':
            print i, j

Output:

0 1

answered Aug 26, 2015 at 7:16

Sakib Ahammed

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