How to remove the last line in python to keep it at exactly 10 lines

Question

I have a text file that already prepends until it has 10 lines

    Line 10
    Line 9
    Line 8
    Line 7
    Line 6
    Line 5
    Line 4
    Line 3
    Line 2
    Line 1

Now if I prepend more line into this text file. It'll become 11 Line

    Line 11
    Line 10
    Line 9
    Line 8
    Line 7
    Line 6
    Line 5
    Line 4
    Line 3
    Line 2
    Line 1

And now, I want to remove the Line 1 from the file to keep it only 10 lines long. How do I do that in python?

question from:https://stackoverflow.com/questions/66060436/how-to-remove-the-last-line-in-python-to-keep-it-at-exactly-10-lines

Answer 1

Once you have read your lines, you can use slicing before writing them again with:

lines = lines[:10]  # Keep 10 first lines