photoREPL drops you at a Python prompt, with a few custom functions and a copy of rawkit imported, and spawns a preview window for any photos you edit. As you make changes to your photos, the image in the preview window is updated to reflect those changes, giving you near real time editing directly from Python without a lot of extra update calls!
To run try:
or run it directly:
python -i -m photorepl [some_raw_photos]
you can also install it via pip:
pip install photorepl