How to get text between 2 specific lines - Python

Question

I have a big text, I have split it into lines. Let's say the text is 100 lines I want to get whatever is between line 30 and line 60 How do I do that?

Via list indices: `lines[30:60]` – fsimonjetz Jun 28 '21 at 14:49 — fsimonjetz, Jun 28 '21 at 14:49
Please post a sample of your text. – Ram Jun 28 '21 at 14:52 — Ram, Jun 28 '21 at 14:52

score 0 · Answer 1 · answered Jun 28 '21 at 14:52

With lists in python, you can chose what part of a list with the [x:y].

For example let's say you have a list

list = [0,
    1,
    2,
    3,
    4,
    5]

If you only want the part of the list contained between 1 and 4 you can type list[1:4] and it will return you [1, 2, 3, 4].

Have a nice day.

score 0 · Answer 2 · answered Jun 28 '21 at 14:53

If I'm got it right, your question is quite related to this: How to read a file line-by-line into a list?

You could do:

with open("file.txt") as file_in:
    lines = []
    for line in file_in:
        lines.append(line)

or simply:

with open('file.txt') as f:
    lines = f.readlines()

and work with the lines you would like to, according to index of lines created. Something like:

sub_text = lines[30:60]

score 0 · Answer 3 · answered Jun 28 '21 at 14:59

If the lines are seperated by new lines, you can use the .split method to turn your long String into a list, and then get everything from index 29 to 59 using a for loop.

Here's an example:

seperatedText = longString.split("\\n")
for i in range 30:
   print(seperatedText[i + 29])

Of course you can also put the output into a second list by using the .append method or whatever you want.

I hope I could help you, and I'd really appreciate an upvote or an approve for my reputation :)

How to get text between 2 specific lines - Python

3 Answers3