Question asked in the facebook python community

matrix_sum-col.py

#!/usr/bin/env python3
"""
    Uma matrix é formada por vetores
    Ex:
    m = [[1, 1234, 567, 890, 10],
          [1, 1234, 567, 890, 10],
          [1, 1234, 567, 890, 10]]

    Ou, seja:
    matrix 3x5 == 3 linha, 5 coluna
         0    1    2    3   4
        [1, 1234, 567, 890, 10]
        [1, 1234, 567, 890, 10]
        [1, 1234, 567, 890, 10]

    Pegar a coluna 2, 3 e 4 == (1, 2 e 3), somar +1
    deixar as outras com o valor original.

    input_file:
        1 1234 567 890 10
        1 1234 567 890 10
        1 1234 567 890 10
        1 1234 567 890 10
        1 1234 567 890 10
    output_file:
        1 1235 568 891 10
        1 1235 568 891 10
        1 1235 568 891 10
        1 1235 568 891 10
        1 1235 568 891 10
"""
input_file = 'input_file.txt'
output_file = 'output_file.txt'
matrix = []

for row in open(input_file, 'rb'):
    c_int = [int(z) for z in row.split()]

    if len(c_int) == 0:
        pass
    else:
        vector = []
        col = 0
        while col <= 4:
            if col == 0:
                vector.append(str(c_int[col]))
                col += 1
            else:
                if col <= 3:
                    vector.append(str(c_int[col] + 1))
                else:
                    vector.append(str(c_int[col]))
                col += 1
        matrix.append(vector)

with open(output_file, 'w') as o:
    for m in matrix:
        o.write('{}\n'.format(' '.join(m)))