CODEWITHSUNDEEP
python
user7249622
user7249622

Reputation:

Modifying a complex fixed text file?

I have a text file like this example:

fit c3 start=1455035 step=1
2.000000
2.000000
2.000000
2.000000
2.000000
2.000000
fit c2 start=5195348 step=1
1.000000
1.000000
1.000000
1.000000
1.000000
fit c4 start=6587009 step=1
10.000000
10.000000
10.000000
10.000000
10.000000

each text line(starting with fit) is followed by some number lines. I want to sum all numbers which are below each text line (so they are in the same group) and replace the last number of that group by the sum of number of that specific group and also replace the rest of numbers by 1.000000 - like in this output example:

fit c3 start=1455035 step=1
1.000000
1.000000
1.000000
1.000000
1.000000
12.000000
fit c2 start=5195348 step=1
1.000000
1.000000
1.000000
1.000000
5.000000
fit c4 start=6587009 step=1
1.000000
1.000000
1.000000
1.000000
50.000000

and write it into a new file.

I tried this code in Python, but actually did not return what I want.

infile = open("file.txt", "r")
for line in infile:
    if line startswith"fit":
        for l in len(line):
            line[l] = line + line[l+1]

Do you know how to do that in python?

Upvotes: 0

Views: 57

Answers (2)

BatyaGG
BatyaGG

Reputation: 734

Please, try this out.

prev_string = ' '
global_string = ''
temp_sum = 0

with open('file.txt', 'r') as f:
    prev_string = f.readline()
    for line in f:
        if prev_string[0] == 'f':
            global_string += prev_string
        elif (line[0].isdigit() and prev_string[0].isdigit()):
            global_string += '1.000000\n'
            temp_sum += float(prev_string[:-1])
        else:
            temp_sum += float(prev_string[:-1])
            global_string += str(format(temp_sum, '.6f')) + '\n'
            temp_sum = 0
        prev_string = line
    global_string += str(format(temp_sum + float(prev_string[:-1]), '.6f'))

with open('output.txt', 'w') as out:
    out.write(global_string)

Upvotes: 0

Ghilas BELHADJ
Ghilas BELHADJ

Reputation: 14096

lines = open("file.txt", "r").read().splitlines()
_sum = 0.
for i, line in enumerate(lines):
  if not line.startswith('fit') :
    _sum += float(line) 
    lines[i] = '{:0.6f}'.format(1.)

  if line.startswith('fit') and  i > 0:
    lines[i-1] = '{:0.6f}'.format(_sum)
    _sum = 0
  elif i+1 >= len(lines):
    lines[i] = '{:0.6f}'.format(_sum)


print '\n'.join(lines)

output

fit c3 start=1455035 step=1
1.000000
1.000000
1.000000
1.000000
1.000000
12.000000
fit c2 start=5195348 step=1
1.000000
1.000000
1.000000
1.000000
5.000000
fit c4 start=6587009 step=1
1.000000
1.000000
1.000000
1.000000
50.000000

Upvotes: 2

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