OCR again

[wavic]

Alright, I see it that way. Simplified:

def convert_img(img_obj):
    return new_img # not  written to the disk but in memory

def do_ocr(image_data):
    return document 

def worker(path):
    with open(path, 'br') as file_obj:
        converted = convert_img(file_obj)

    document = do_ocr(converted)

    with open(path, 'w') as doc:
        doc.write(document)

images = pathlib.Path('path_to_folder').glob('**/*.tif') # recusively. returns a generator

with concurrent.futures.ThreadPoolExecutor() as executor:
    _ = executor.map(worker, images)

Should it work ? I think it's IO bound so threads are used here.