Write to the last line of a text file?

Question

I am trying to get the program to automatically start at the last line of a text file when I run it and make it write on the last line. My current code is as follows:

with open('textfile.txt', 'a+') as tf
    last_line = tf.readlines()[-1]
    tf.write(linetext + '\n')`

When I run this, it says that the list index is out of range. How do I get this to automatically skip to the last line of a text file and start writing from there?

Yes, just open the file like this `with open('textfile.txt', 'a') as tf:` and then whatever you `.write` to it will be appended at the end of the file. — Stam Kaly, Jul 19 '17 at 18:11
Oh ok, I must have misunderstood, since it showed your link differently. thanks. — chickity china chinese chicken, Jul 19 '17 at 18:16
I do not want to close a vote. I want the Flag to merge same votes. Perhaps I completely do not understand how identical Flag requests work. I expected to see the number next to my flag increment when another user Flags with the same duplicate link. — chickity china chinese chicken, Jul 19 '17 at 18:18
@downshift Flagging is different. https://stackoverflow.com/help/privileges/close-questions — OneCricketeer, Jul 19 '17 at 18:20
Anyway, back to the question. https://stackoverflow.com/a/30566011/2308683 — OneCricketeer, Jul 19 '17 at 18:20

score 3 · Answer 1 · answered Jul 19 '17 at 18:15

3

Use the a flag while opening the file

with open('path/to/file', 'a') as outfile:
    outfile.write("This is the new last line\n")

answered Jul 19 '17 at 18:15

inspectorG4dget

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Write to the last line of a text file?

1 Answers1

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