python - Modifying a file text -

i have text file this:

0  1  0  10.2  5.82  4.82 1 -1  0  8.21  5.74  3.62 0  1  1  5.33  8.66  5.47 

this text file has few hundred rows pattern.

in first row, if first column 0, fourth column same. second column 1, fifth column has +10, value 15.82.

in second row, if first column 1, forth column has +10, value 18.21. second column -1, fifth column has -10, value -4.26. etc.

the final output this:

10.20  15.82  4.82 18.21  -4.26  3.62  5.33  18.66  15.47 

i have tried using code wrote:

with open('abc') f, open('out.txt', 'w') f1:     line in f:         reff = line.split()          if reff[0] == '0':             value = float(reff[3])             = str(value)             line = "".join(a) + " " + "".join(reff[4]) + " " + "".join(reff[5]) + '\n'          elif reff[0] == '1':             value = float(reff[3]) + 10             = str(value)             line = "".join(a) + " " + "".join(reff[4]) + " " + "".join(reff[5]) + '\n'          elif reff[0] == '-1':             value = float(reff[3]) - 10             = str(value)             line = "".join(a) + " " + "".join(reff[4]) + " " + "".join(reff[5]) + '\n'          f1.write(line) 

i have added more if , elif statements inside each if , elif statements in order check second column , third column. however, fourth column updated.

what doing wrong?

this can done simply:

with open('abc') f, open('out.txt', 'w') f1:     line in f:         line = line.split()         in range(0,3):             line[i+3] = float(line[i+3])+(int(line[i])*10)         f1.write(' '.join([str(value) value in line[3:]]) + '\n') 

which give output:

10.2 15.82 4.82 18.21 -4.26 3.62 5.33 18.66 15.47