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While developing a streaming app for Pythonista I noticed that it usually crashes after some time. Turns out it's somehow related to loading/unloading images with scene. Here is a minimal example that crashes Pythonista reliably:

import scene
import random
from cStringIO import StringIO
import Image

def raw_jpeg(img):
    buf = StringIO()
    img.save(buf, 'JPEG', quality=50)
    data = buf.getvalue()[::]
    buf.close()
    return data

imglist = [raw_jpeg(img) for img in [
    Image.new('RGB', (512, 384), 'red'),
    Image.new('RGB', (512, 384), 'yellow'),
    Image.new('RGB', (512, 384), 'green'),
    Image.new('RGB', (512, 384), 'blue'),
    Image.new('RGB', (512, 384), 'gray'),
]]

imgnames = []
while True:
    name = scene.load_image_data(random.choice(imglist))
    if len(imgnames) == 16:
        scene.unload_image(imgnames.pop(0))
    imgnames.append(name)
    print name

It takes a variable amount of time, somewhere between a second and a minute I'd say. And using scene.load_pil_image instead does not help, but only makes the loading process slower.
Am I missing something? scene.unload_image should free memory, and since this example never exceeds 16 images loaded at once it should have plenty of that.
EDIT: I am using iPad 4 and what seems to be the latest version of Pythonista.

Are you in the beta? I seem to recall that I recently fixed a bug in unload_image, but it's not in the App Store version yet.

Edit: I just saw that you're using the latest App Store version... Let me know if you'd be interested in checking out the beta.

@omz how long would it take for this fix to make it into the App Store? Also, will getting the beta affect my files/settings in any way?

I experience the same problem.
@OMZ: Any idea whan that will be fixed? Or is there a workaround?