proces.py

#!/usr/bin/python3

import os
from PIL import Image

OUTPUT_FILE_PATH = "./opt/icons/"
ORIGINAL_FILE_PATH = "./images/"
FILL_COLOR = (120, 8, 220)


def process_image(Image_obj):
    """ Take an Image.open() and return Image.open()
    object with 90° clockwise and size image to 128 x128 """

    Image_obj = Image_obj.resize((128, 128))
    Image_obj = Image_obj.rotate(90)
    return Image_obj


def saveImgToJPEG(Image_obj, file_path):
    """ Take an Image.open() obj and save it to file_path and return success if a file success
    to save as JPEG (.jpeg) format
    """

    if os.path.exists(OUTPUT_FILE_PATH) == False:
        os.makedirs(OUTPUT_FILE_PATH)

    # Set Background Color to make the image doesnt go Black after converting
    # Background color is set to FILL_COLOR variable
    Image_obj = Image_obj.convert('RGBA')
    background = Image.new(
        Image_obj.mode[:-1], Image_obj.size, FILL_COLOR)
    background.paste(Image_obj, Image_obj.split()[-1])  # omit transparency
    Image_obj = background

    # I dont know why but we have to convert it to RGB and save it
    Image_obj.convert("RGB").save(file_path, "JPEG")
    print("An image successfully save to {}".format(file_path))


image_file_list = os.listdir(ORIGINAL_FILE_PATH)[1:]

# Setup


for file in image_file_list:
    if file == ".DS_Store":
        continue
    image_path = "{}{}".format(ORIGINAL_FILE_PATH, file)
    save_file_path = "{}{}".format(OUTPUT_FILE_PATH, file)

    im = Image.open(image_path)
    im = process_image(im)
    print(im.size)
    saveImgToJPEG(im, save_file_path)