rsplit (from LIST)

This is the rsplit that keeps all the pieces together. Where rsplit (from data list) hands each part to ComfyUI as an individual value, this variant returns a single Python LIST variable holding every part - which you then operate on as one unit. Same split-from-the-right logic, different container, different downstream workflow.

Choose this when you want to keep the parts bundled: split a string, then sort, join, count, or index into the parts as a whole rather than having ComfyUI process each part separately. The classic case is maxsplit=1 on a path or filename - rsplit(".", 1) gives you ["stem", "ext"] as a two-element list, and you grab whichever slot you need without the string falling apart into a batch.

How it works

Python's str.rsplit(sep, maxsplit), splitting from the right. Empty sep (the default) means whitespace splitting - any run of whitespace is a separator, and consecutive whitespace collapses so you don't get empty tokens. maxsplit defaults to -1 (no cap); set it to split only the last few separators.

• "a,b,c".rsplit(",", 1) → ["a,b", "c"]
• "folder/photo.png".rsplit("/", 1) → ["folder", "photo.png"]
• " a b ".rsplit() (empty sep) → ["a", "b"]

Inputs and outputs

• string - required, the text to split.
• sep - optional STRING, default "". Empty means whitespace splitting; otherwise split on that literal separator.
• maxsplit - optional INT, default -1. Max number of splits from the right.

Output is one LIST - a single Python list variable containing the parts.

Installing it

Part of the Basic data handling pack by StableLlama. ComfyUI Manager, search "Basic data handling", install, restart. Manual route:

cd ComfyUI/custom_nodes
git clone https://github.com/StableLlama/ComfyUI-basic_data_handling

Pure Python, zero dependencies, no downloads. Under Basic/STRING in the menu.

Common issues

The biggest confusion is choosing between the two rsplit outputs, so let's be blunt about the difference: a data list is ComfyUI-native and each item flows through your graph individually; a LIST is one Python object that moves as a whole. The pack's README has a table on exactly this - data list for batch/per-item processing, LIST when you want index-based access or to work with the collection as a unit. If you connect a LIST output somewhere expecting per-item data, you'll get the whole list where one item was expected. Also remember maxsplit counts from the right, so with maxsplit=1 the unstripped remainder is the first element - ["everything else", "tail"] - which catches people used to split's left-handed order.