Insert Tuple Into 2D Array

Asked May 13 '17 at 00:38

Active May 13 '17 at 00:57

Viewed 20 times

I'm trying to insert some tuples into a 2D array, but for some reason, the x value doesn't seem to increase.

x_axis = 20
y_axis = 4
arr = [[None]*y_axis]*x_axis
for x in range(x_axis):
    for y in range(y_axis):
        arr[x][y] = (x,9,y,6)

for x in range(x_axis):
    for y in range(y_axis):
        print arr[x][y]

I'm getting this:

(19, 9, 0, 6)
(19, 9, 1, 6)
(19, 9, 2, 6)
(19, 9, 3, 6)
(19, 9, 0, 6)
(19, 9, 1, 6)
(19, 9, 2, 6)
(19, 9, 3, 6)
(19, 9, 0, 6)
(19, 9, 1, 6)
(19, 9, 2, 6)
(19, 9, 3, 6)
(19, 9, 0, 6)
(19, 9, 1, 6)
(19, 9, 2, 6)
(19, 9, 3, 6)
(19, 9, 0, 6)
(19, 9, 1, 6)
(19, 9, 2, 6)
(19, 9, 3, 6)

I have no idea why the x is sticking to 19 (the last number of the range) and not just counting from 0-19 inclusive.

edited May 13 '17 at 00:53

asked May 13 '17 at 00:38

Bradman175

2

Also covered here: https://docs.python.org/2/faq/programming.html#how-do-i-create-a-multidimensional-list – AChampion May 13 '17 at 00:59
Thanks, @AChampion for finding a duplicate and posting the docs. Ignore my answer. – thenormalsquid May 13 '17 at 01:00
@AChampion Thanks. The 4th block of code in that document does the trick! – Bradman175 May 13 '17 at 01:06

Insert Tuple Into 2D Array

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