How do I add extensions to files using python in multiple subdirectories

Question

I need to add a .jpg extension to around 300K pictures. They are all in 12 sub-directories and four more subdirectories in each of those 12.

I tried following this post but didn't do a walk down to all subdirectories: Adding extension to multiple files (Python3.5)

I also tried the following:

import os

path = 'C:\\Photos'
genmod = os.walk(path)

for path, pathnames, files in gen_obj:
    for file in files:

        head, tail = os.splitext(file)
        if not tail:
            src = os.path.join(path, pathnames, file)
            dst = os.path.join(path, pathnames, file + '.jpg')

            if not os.path.exists(dst): # check if the file doesn't exist
                os.rename(src, dst)

The above runs but nothing happens.

You should use [pathlib](https://docs.python.org/3/library/pathlib.html), part of the standard library and should be used instead of `os`. [Python 3's pathlib Module: Taming the File System](https://realpython.com/python-pathlib/) — Trenton McKinney, Sep 18 '19 at 19:10

score 2 · Accepted Answer · answered Sep 18 '19 at 19:04

The above runs but nothing happens.

I doubt that, there are 2 problems:

os.splitext should be os.path.splitext

os.path.join should not be given pathnames, so

os.path.join(path, pathnames, file)

should be

os.path.join(path, file)

and

os.path.join(path, pathnames, file + '.jpg')

should be

os.path.join(path, file + '.jpg')

How do I add extensions to files using python in multiple subdirectories

1 Answers1