Get Float From List | Deforum

In animation, floats travel in lists - a whole camera path or a per-frame strength curve is naturally one list of numbers. But a list is only useful if you can get a single value out of it at the right moment. Get Float From List is the index lookup for float lists: list[index], with a wire on it.

You'll reach for it when a list is driving something that needs one value at a time - pull the strength for frame 50 off a curve and feed it to a sampler, or step through a list of animation values one per loop iteration by feeding an index that increments with the frame counter.

Inputs and output

• list - a list of FLOAT values. In practice this comes from a list-producing node - Make List, Accumulation to List (if you accumulated floats), or any pack that emits a float list.
• index - INT, default 0, from 0 up to 100000. Standard zero-based indexing.
• Output: FLOAT - the value at that position.

The sibling Get Int From List | Deforum is identical but for integer lists, so pick the one matching the list's content type - ComfyUI's typing will actually complain if you wire the wrong one.

Gotchas

Out-of-range index = hard IndexError, run dies. If your index is derived from a frame counter, guard it with the list's length (or clamp it) - and remember zero-based indexing means frame 1 is index 0. If you're iterating, this pairs naturally with the Deforum For Loop nodes: the loop gives you an incrementing counter, this node turns it into a value off your list.

One more: the input expects a list that ComfyUI recognizes as a float list, which is usually a node that outputs a list rather than a single float value. If you're feeding it a plain float, you've got the wrong node - that's the * primitive or Get Int From List's sibling for numbers.

Installing it

Ships in deforum-comfy-nodes, the official Deforum ComfyUI pack. ComfyUI Manager: search "deforum" (comfyui-deforum), install, restart. Manual:

cd ComfyUI/custom_nodes
git clone https://github.com/deforum-art/deforum-comfy-nodes

Restart ComfyUI after. No extra dependencies, no model downloads. Known load-error cause after upgrades: an orphaned deforum pip package; pip uninstall deforum and restart.