Python script to rename files in directory, transforming spaces to hyphens and the chars to lowercase

rename.py

import os

""" 
Renames the filenames within the same directory to be Unix friendly
(1) Changes spaces to hyphens
(2) Makes lowercase (not a Unix requirement, just looks better ;)

Usage:
python rename.py
"""

path =  os.getcwd()
filenames = os.listdir(path)

for filename in filenames:
    os.rename(filename, filename.replace(" ", "-").lower())

I have two cameras in the raspberry pie that every time it overwrites the name of the image, for example, image 1 and image 2,
when I run it again, it overwrites on image 1 and image 2, how can I rename previous images to avoid overwriting?

Thank you

Thank you so much,,, I searched so many links to rename my files in a folder with a regular expression/pattern none worked, But this.

Is there any way to extend this script down the tree to rename folders and files within folders???

Thank you, that's what i was looking for.

Does it read the names in ascending order?

Great! It’s simple, it works. 👍 Thank you!

There's a simpler way to do this using the linux rename command, if you'd like:

rename --force 's/ /-/g' *

If you run that on the CLI it'll rename all files in the current directory -- exchanging spaces for dashes.

@rdegges that does not make uppercase -> lowercase though.

how can i change only the first letter of a filename into uppercase??

how about removing leading space in multiple files in a directory?
i have many files in a directory and each one start with a space. so how to batch remove that?