Question

I have a 1D array e.g. arr1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, ...] of arbitrary length.

How do I print this to a text file (with integers/floats separated by spaces) so that every 7 elements are printed on the same line in the text file?

So I want the text file to look like this:

Line 1:1 2 3 4 5 6 7

Line 2:8 9 10 11 12 13 14

Answer 1

you could do this:

liNums = xrange(1, 20)
x = 0
line = ""
for i in liNums:
    x+=1
    line += "%s " % i
    if not x%7:
        line += "\n"
#send line to output, here I will just print it
print line

here every 7 items a new line is appended… output looks like this:

1 2 3 4 5 6 7 
8 9 10 11 12 13 14 
15 16 17 18 19 

hope that helps!