Limits, yes. Callback, maybe not so much.<p><a href="https:&#x2F;&#x2F;github.com&#x2F;python-pillow&#x2F;Pillow&#x2F;blob&#x2F;master&#x2F;PIL&#x2F;PngImagePlugin.py#L86" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;python-pillow&#x2F;Pillow&#x2F;blob&#x2F;master&#x2F;PIL&#x2F;PngI...</a>