Constructing output into columns& rows

Hi, I have written this but the result i get is a list

a=[1,2,3]
b=[13,14,15]
for i in a:
for j in b:
print i,i-2-((i*2)+(i*j))

I would like to have the output to be in coloumns (=i) and rows (=i-2-((i*2)+(i*j))). Can someone help me pls.

thanks in advance!

You have written that and the result you get is a list. I'm not trying to be a jerk and nitpicking your grammar, I'm drawing attention to the point that the output is what you tell it to be. You're getting a list because your program is structured to print the outputs one after the other.

And from that understanding, the answer appears - you can't just ask the program you have to print as a table, because it's a list printing program through and through. You have to rebuild your program into being a program that inherently prints a table output.

The main options are:

- Instead of calculating an answer, printing it, moving on; calculate a row of answers, print them, then move on.

- Instead of calculating and printing, calculate all the answers and store them, then go through the store and print the results as a table. You might use nested lists [[1,2,3], [1,2,3], [1,2,3]] and the pprint module, perhaps.

- Instead of calculating and printing where the cursor happens to be, calculate then find a way of moving the cursor so it will print wherever you want, then print the output. Not sure how to do this easily, though.

It is hard to tell from your description, but maybe you want something as simple as this:


This will output the results as a 3 x 3 matrix:
-16 -17 -18
-30 -32 -34
-44 -47 -50

The comma at the end of the first print statement stops it printing a newline, and the second print statement starts the next line.

Dave

PS please put your code in [code] or [highlight] blocks to preserve the indentation. See the 'Asking for help' thread at the top of the forum.