Converting set of images into PDF using Pillow

impil.py

from PIL import Image
import requests
from io import BytesIO
from io import StringIO

url1 = "https://res.cloudinary.com/prestige-gifting/image/fetch/fl_progressive,q_95,e_sharpen:50,w_480/e_saturation:05/https://www.prestigeflowers.co.uk/images/NF4016-130116.jpg"

url2 = "https://static.pexels.com/photos/39517/rose-flower-blossom-bloom-39517.jpeg"

url3 = "https://i.pinimg.com/736x/f2/01/57/f201574c8705365b2c3e182953f765f2--blue-roses-blue-flowers.jpg"

im1 = Image.open(BytesIO(requests.get(url1).content)).convert("RGB")
cs1 = BytesIO()
im1.save(cs1,format="JPEG", dpi=(19.0,19.0), quality=60, optimize=True)
cs1.seek(0)
imcs1 = Image.open(cs1)
print(imcs1.info)

im2 = Image.open(BytesIO(requests.get(url2).content)).convert("RGB")
cs2 = BytesIO()
im2.save(cs2,format="JPEG", dpi=(19.0,19.0),quality=60, optimize=True)
cs2.seek(0)
imcs2 = Image.open(cs2)



im3 = Image.open(BytesIO(requests.get(url3).content)).convert("RGB")
cs3 = BytesIO()
im3.save(cs3,format="JPEG", dpi=(19.0,19.0),quality=60, optimize=True)
cs3.seek(0)
imcs3 = Image.open(cs3)


images = [imcs1, imcs2, imcs3]
#images = [im1, im2, im3]
images[0].save("out.pdf",quality=60,resolution=19.0, optimize=True,  save_all=True, append_images=images[1:])