Removing initial whitespace plus the last empty new line line using python

Question

I am trying to implement a code that prints an 8 by 8 matrix (0 to 63). It should however remove the initial tab spaces and the last empty line. My code is below :

s =''
for i in range(n):
    for j in range(n):
        z = i * n + j
        s += ' '
        if z < 10:
            s += ' '
        s += str(z)
    s += 'n'
print(s)

The image Below is also the desired output

I have tried the dedent function but it fails to remove the last line as well

Asked By: Frankline Misango

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Source

Answer 1

Could you try

n = 8 
print("n".join([" ".join(["{:2d}".format(i*n+j) for j in range(n)]) for i in range(n) ]), end="")

Output:

 0  1  2  3  4  5  6  7
 8  9 10 11 12 13 14 15
16 17 18 19 20 21 22 23
24 25 26 27 28 29 30 31
32 33 34 35 36 37 38 39
40 41 42 43 44 45 46 47
48 49 50 51 52 53 54 55
56 57 58 59 60 61 62 63

Answered By: Xin Cheng

Answer 2

Basically all you are looking for is whenever you go to a new line, the initial space is not printed, since every newline is a j, you will need to add:

        if j != 0:
            s += ' '

It should work. Will look like this now:

s =''
for i in range(n):
    for j in range(n):
        z = i * n + j

        if j != 0:
            s += ' '
        
        if z < 10:
            s += ' '
        s += str(z)
    
    if i != j:
        s += 'n'
print(s)

Let me know if it has any problems.

Answered By: was1209

Removing initial whitespace plus the last empty new line line using python

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