使用os.walk重命名图片：提取文件夹名前缀作为图片名前缀

Hey there! Let's work through the issues in your code and get it working exactly how you want it.

Key Problems in Your Current Code #

• You're trying to split files (which is a list of filenames) instead of the actual folder name. That's why you can't pull the correct prefix—you're targeting the wrong variable entirely!
• You're using the top-level path to build file paths instead of root, which will break if you have subfolders (since images live in root, not the main folder you started with).
• The counter i doesn't reset per folder, so images across different folders will have continuous numbering (probably not what you want unless you intend global numbering).

Corrected Code #

import os

path = r'C:\folderPath'

for root, dirs, files in os.walk(path):
    # Grab the name of the current folder we're processing
    folder_name = os.path.basename(root)
    # Split the folder name ONLY at the first ' - ' to get our prefix
    prefix = folder_name.split(' - ', 1)[0]
    # Reset counter for each new folder (remove this line if you want global numbering)
    i = 1
    for image in files:
        # Optional: Only process image files to avoid renaming non-image items
        if image.lower().endswith(('.jpg', '.jpeg', '.png', '.gif')):
            # Build the correct old and new file paths
            old_file_path = os.path.join(root, image)
            new_file_path = os.path.join(root, f"{prefix}_{i}.jpg")
            # Rename the file
            os.rename(old_file_path, new_file_path)
            i += 1

What's Changed & Why? #

1. Extract the Folder Name: os.path.basename(root) pulls just the folder name from the full directory path (e.g., "ABCDEF - THIS IS - MY FOLDER - NAME" from the full root path).
2. Clean Split: folder_name.split(' - ', 1)[0] splits the folder name only once at the first occurrence of ' - ', so we reliably get the leftmost segment ("ABCDEF" in your example). The 1 ensures we don't split on any subsequent dashes in the folder name.
3. Correct File Paths: Using root instead of the top-level path ensures we target the right files, even in nested subfolders.
4. Image Filter: The optional check ensures we only rename image files, so you won't accidentally mess with documents or other non-image items.
5. Per-Folder Numbering: Resetting i to 1 for each folder means each folder's images start counting from 1. If you want a single counter across all folders, move i = 1 outside the os.walk loop.

Example Output #

For a folder named "ABCDEF - THIS IS - MY FOLDER - NAME" with images dsc_001.jpg and dsc_002.jpg, they'll be renamed to ABCDEF_1.jpg and ABCDEF_2.jpg respectively.

内容的提问来源于stack exchange，提问作者John1276