未知文件扩展名将图像转换为 pdf 失败

Question

I have the following code that loops through all the images with any extension in multiple folders then to convert those images to pdf I am stuck at the last line of saving the pdf file

from PIL import Image
import os

path = 'MAIN'
ext = ['.jpg', '.jpeg', '.png', '.bmp', '.tif', '.tiff']

for root, dirs, files in os.walk(path):
    for file in files:
        if(file.endswith(tuple(ext))):
            sFilePath = os.path.join(root,file)
            print(sFilePath.split('.')[0])
            img = Image.open(sFilePath)
            img = img.convert('RGB')
            img.save(os.path.join(sFilePath.split('.')[0], '.pdf'))

Another point I need to add is to delete the image file after converting it to pdf

@martineau as for your awesome solution you provided, I tried to change the way I convert the image to pdf using img2pdf Here's my try

import img2pdf
with open(path_object.parent / (path_object.stem + '.pdf'), 'wb') as f:
    f.write(img2pdf.convert(str(path_object)))

with the images with the alpha channel, I got this message Image contains an alpha channel which will be stored as a separate soft mask (/SMask) image in PDF.

This is snaphot of the error message related to the alpha-channel images

Answer 1

You can do it by using theos.path.splitext() function to get base part of the image's filename, and then combine that plus the .pdf extension you want using os.path.join() . (Note that converting it to RGB is not the same as converting it to PDF format.)

from PIL import Image
import os

path = './'
ext = ['.jpg', '.jpeg', '.png', '.bmp', '.tif', '.tiff']

for root, dirs, files in os.walk(path):
    for file in files:
        if file.endswith(tuple(ext)):
            src_image_path = os.path.join(root, file)
            base_name = os.path.splitext(file)[0]
            img = Image.open(src_image_path)
            img = img.convert('RGB')
            img.save(os.path.join(root, base_name+'.pdf'))

Answer 2

Another yet way to do things that makes use the pathlib module which allows file and folder paths to be tried as objects and manipulated via an object-oriented programming paradigm or model — which often results in very concise code:

from pathlib import Path
from PIL import Image

path = Path('./images')
exts = {'.jpg', '.jpeg', '.png', '.bmp', '.tif', '.tiff'}

for path_object in path.glob('**/*'):
    if path_object.is_file() and path_object.suffix in exts:
        img = Image.open(path_object)
        img = img.convert('RGB')
        img.save(path_object.parent / (path_object.stem+'.pdf'))