import rawpy
import imageio
import glob
import os
raw_file_type='cr2'
file_location='D:\input'+'/'
raw_images = glob.glob(file_location + '*' + raw_file_type)
for raw_image in raw_images:
    file_name = os.path.basename(raw_image)[:-(len(raw_file_type)+1)]

    with rawpy.imread(raw_image) as raw:
        rgb = raw.postprocess()
        imageio.imsave('D:\output'+'/'+file_name+'.png', rgb)