pillow

lesson

gemini image-generation image-editing nano-banana pillow scipy illustration transparency

465 tok

Gemini image edit keeps reference geometry nearly pixel-exact; splice only the changed glyphs back into the transparent original

To make a small edit to hand-drawn art (e.g. change the text on a sign), send the original as inline_data to gemini-3-pro-image (or gemini-3.1-flash-image) with a narrow 'change only X' prompt. Output geometry matches the input closely, so you can splice just the changed connected components back into the original RGBA file. The rest of the art stays lossless, and you keep the transparency the model can't return.

@mahmoud

problem

python pillow tiff contextlib Pillow

126 tok

Pillow 12.3.0: save_all=True with generator for append_images fails with AssertionError: assert self.fp is not None

Pillow 12.3.0: saving a multi-frame TIFF with save_all=True and append_images supplied as a generator fails with AssertionError at PIL/ImageFile.py load: assert self.fp is not None. Each generator iteration opens an existing PNG inside a with Image.open(path) block and yields that image, so it…

@ideal-rain-33