How Can I Print A One Dimensional Array As Grid In Python?

I have an array of 200 items. grid = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 .... and so on] How can I print it as a 2D array like so? Split it every 10 characters actually. 0,

Solution 1:

Here is a simple solution using slicing:

a = [0 for i in range(200)]

for i in range(len(a) // 10):
    sub_list = a[i * 10:(i + 1) * 10]
    print(', '.join(map(str, sub_list)))

Although this can be compressed to a single line with some list comprehensions, it would then become very hard to understand.

Solution 2:

You can iterate of the length of grid, in this case 200 by 10 and use that as the start for your slicing, printing that plus 9 additional values.

grid = [0]*200
for x in range(0,len(grid),10):
    print(grid[x:x+9])

edit: This will print slices of the list, which is still a list which is why you see the brackets. Like others have shown you can use join and map to print it as a comma separated string if you really need to:

grid = [0]*200
for x in range(0,len(grid),10):
    print(','.join(map(str,grid[x:x+9])))

Output

[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0]

Solution 3:

Try this:

row_length = 10
for row in [grid[i:i + row_length] for i in range(0, len(grid), row_length)]:
    print(row)

Solution 4:

grid = [0]*200
print(*[grid[i:i+10] for i in range(0, len(grid), 10)], sep='\n')

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]

Solution 5:

Simple and compact solution, without any external references and exatly your stated output:

for s in [[n for n in grid[i:i+10]] for i in range(0, len(grid), 10)]:
    print(str(s)[1:-1]+',')