Python - Remove text between two string of the same line

Question

I have a file with text like below. I need to remove anything between "AS" and "$$" but keep those 2 words. The replacement should be for the same line and I dont need to check for multi lines as AS and $$ always are in the same line

AS '-1', $$ 
Some extra lines 1
some extra lines 2
AS '24:-1', $$ 
Some extra lines 3
some extra lines 4
AS 'abc-1', $$ 
Some extra lines 5
some extra lines 6

The output should be

AS $$ 
Some extra lines 1
some extra lines 2
AS $$ 
Some extra lines 3
some extra lines 4
AS $$ 
Some extra lines 5
some extra lines 6

Borna Gojšić · Accepted Answer · 2020-08-04 17:47:09Z

1

You can read the lines and store them in a list:

with open('file.txt', 'r') as f:
    text = [line for line in f]

Then you can check whether the line contains 'AS' and '$$' and if it does you can write out 'AS $$', otherwise you write out the original line:

with open('txt.txt', 'w') as f:
    for t in text:
        if 'AS' in t and '$$' in t:
            f.write('AS $$\n')
        else:
            f.write(t)

answered Aug 4, 2020 at 17:47

Borna Gojšić

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TheoretiCAL · Accepted Answer · 2020-08-04 17:44:46Z

1

You can read the lines and use split to get the first and last element from each line to determine if you want to write 'AS $$' or the original line in the new file:

with open("test.txt","r") as input_file:
   lines = input_file.readlines()
   with open("out.txt","w") as output_file:
      for line lines:
         line = line.strip() #remove newline character
         values = line.split() #break up line by spaces, so AS '-1', $$ becomes ['AS', '-1,', '$$]
         if values[0] == 'AS' and values[-1] == '$$':
            output_file.write('AS $$\n')
         else:
            output_file.write(line + '\n')

edited Aug 4, 2020 at 17:44

answered Aug 4, 2020 at 17:10

TheoretiCAL

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1 Comment

Phani Over a year ago

I can have some extra lines as well in between which I need those as well

Alexandre Moreira · Accepted Answer · 2020-08-04 17:12:41Z

0

If you don't care for what's between the 2 words you should just read how much lines you have and write "AA $$" for the number of lines x)

No need to complexify the problem !

answered Aug 4, 2020 at 17:12

Alexandre Moreira

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