putting text,csv,excel file in pattern

Question

I am beginner for real programming and have the ff problem I want to read many instances stored in a file/csv/txt/excel like the folloing

find<S>ing<G>s<p> 

Then when I read this file it goes through each character and start from the six position and continue until the 11 position-the max size of a single row is 12

            -,-,-,-,-,f,i,n,d,i,n,0
            -,-,-,-,f,i,n,d,i,n,g,0
            -,-,-,f,i,n,d,i,n,g,s,0
            -,-,f,i,n,d,i,n,g,s,-,S//there is an S value next to the letter d
            -,f,i,n,d,i,n,g,s,-,-,0
            f,i,n,d,i,n,g,s,-,-,-,0
            i,n,d,i,n,g,s,-,-,-,-,G // there is a G value here at th end of g 
            n,d,i,n,g,s,-,-,-,-,-,P */// there is a P value here at th end of s 

Here is the code that I tried in python. but can be possible in c++, java, dotNet.

import sys
import os
f = open('/home/mm/exprimentdata/sample3.csv')// can be txt file 
string = f.read()

a = [] 
b = []
i = 0
while (i < len(string)):

    if (string[i] != '\n '):
        n = string[i]
        if (string[i] == ""):
            print ' = '
                if (string[i] = upper | numeric)
                print rep(char).rjust(12),delimiter=','
        a.append(n)

    i = (i+1)


print (len(a))
print a

my question is how can I compare each string and assign a single char at the rightmost part (position 12 like above G,P,S)

how can I push one step back after aligning the first row?

how can i fix the length

please anyone see fragment and adjust to solve the above case

Answer 1

I don't understand your question.

But some advice:

Firstly, you should be closing the file after you open it.

f = open('/home/mm/exprimentdata/sample3.csv')// can be txt file 
string = f.read()
**f.close()**

Secondly, your indentation is problematic. Whitespace matters in Python. (Maybe your real code is indented properly and it's just a StackOverflow thing.)

Thirdly, instead of using a while loop and incrementing, you should be writing:

for i range(len(string)):
    # loop code

Fourthly, this line will never evaluate to True:

if (string[i] == ""):

string[i] will always be some character (or cause an out of bounds error).

I advise you read a Python tutorial before you try and write this program.