How to convert png image files into one pdf file with no errors due to rgba value cannot save mode RGBA

With this code you should be able to transform your images into a pdf just with PIL

from PIL import Image
from glob import glob
import os

iml = []


files = glob("*.png")
# rgb.save(PDF_FILE, 'PDF', resoultion=100.0)
for f in files:
    print(f)
    print(f[:-4])
    newname = f[:-4] + ".png"
    print(newname)
    os.rename(f, newname)
files = glob("*.png")
print(files)
# rgba = Image.open(PNG_FILE)
# To avoid ValueError: cannot save mode RGBA 
rgba = Image.open(glob("*.png")[0])
rgb = Image.new('RGB', rgba.size, (255, 255, 255))  # white background
rgb.paste(rgba, mask=rgba.split()[3])               # paste using alpha channel as mask
for img in files:
    rgba2 = Image.open(img)
    rgb2 = Image.new('RGB', rgba2.size, (255, 255, 255))  # white background
    rgb2.paste(rgba2, mask=rgba2.split()[3])               # paste using alpha channel as mask
    iml.append(rgb2)
pdf = "ALL.pdf"

rgb.save(pdf, "PDF" ,resolution=100.0, save_all=True, append_images=iml)