Trying to remove last character in file but doesn't work

Question

I have this code which writes some stuff into a file which works perfectly, but before I can use this for something else I need to remove the very last character in the file.

My current code looks like this

for root, dirs, files in os.walk(cwd):
            for file in files:
                if file.endswith('.blend'):
                    with open("filepaths","a+") as f:
                        f.write(f'"{os.path.join(root, file)}",\n')
with open("filepaths", 'rb+') as f:
    f.seek(0,2)
    size=f.tell()
    f.truncate(size-1)

The file that needs to be edited looks like this

"/home/django/copypaste/cleanup/var/media/admin/cedd0c01-930e-4b43-91de-c45447a8f30f/splash279/splash279.blend",
"/home/django/copypaste/cleanup/var/media/admin/cedd0c01-930e-4b43-91de-c45447a8f30f/splash279/lib/props/barbershop_pole.blend",
"/home/django/copypaste/cleanup/var/media/admin/cedd0c01-930e-4b43-91de-c45447a8f30f/splash279/lib/props/hairdryer.blend",
"/home/django/copypaste/cleanup/var/media/admin/cedd0c01-930e-4b43-91de-c45447a8f30f/splash279/lib/chars/pigeon.blend",
"/home/django/copypaste/cleanup/var/media/admin/cedd0c01-930e-4b43-91de-c45447a8f30f/splash279/lib/chars/agent.blend",
"/home/django/copypaste/cleanup/var/media/admin/cedd0c01-930e-4b43-91de-c45447a8f30f/splash279/lib/nodes/nodes_shaders.blend",
"/home/django/copypaste/cleanup/var/media/admin/cedd0c01-930e-4b43-91de-c45447a8f30f/splash279/tools/camera_rig.blend",

I'm in need of removing the very last character of the file which in this case in the comma, but I can't seem to make it work.

Possible duplicate of [Python - Remove very last character in file](https://stackoverflow.com/questions/18857352/python-remove-very-last-character-in-file) — CodeIt, Dec 13 '18 at 13:51

CodeIt · Answer 1 · 2018-12-13T13:51:14.803

1

Try this code.

# Use file.seek() to seek 1 position from the end, then use file.truncate() to remove the remainder of the file.

with open("a.blend", 'rb+') as filehandle:
    filehandle.seek(-1, os.SEEK_END)
    filehandle.truncate()

edited Dec 13 '18 at 13:51

answered Dec 13 '18 at 13:23

CodeIt

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it seems like the comma is still there after testing. – Lesnie Sncheider Dec 13 '18 at 14:25
I've searched stackoverflow for the same question and none of the answers worked for me. That's why im asking in here. – Lesnie Sncheider Dec 13 '18 at 14:26

score 0 · Answer 2 · answered Dec 14 '18 at 00:20

0

It's possible that I misunderstand the question but I think you might be writing the comma yourself?

f.write(f'"{os.path.join(root, file)}",\n')

                                      ^
                                      | there

Can't you just remove it?

f.write(f'"{os.path.join(root, file)}"\n')

answered Dec 14 '18 at 00:20

finefoot

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@LesnieSncheider Or did you already solve the problem otherwise? – finefoot Dec 14 '18 at 11:28

Trying to remove last character in file but doesn't work

2 Answers2