Misc Code...

misc.py

import os
import png

IMG_DIR = './static/img/'
for _, _, files in os.walk(IMG_DIR):
    for file in files:
        if file.endswith('.png'):
            with open(IMG_DIR + file, 'r+') as f:
                height, width = png.Reader(f).read()[:2]
                f.seek(0)  # reset pointer
                png.Writer(height, width).write_array(f, [200 for i in range((height * width * 3))])
                f.close()