ComfyUI-MultiOutputScript

Version: 1.0.0 License: GPL-3.0

A general-purpose calculation node that executes user-written Python code and returns multiple text and numeric outputs based on the inputs.

This custom node accepts numbers (int/float) and text (string) as inputs, runs calculations and logical operations internally, and returns multiple values through separate output ports. It consolidates workflows that previously required combining several basic nodes into a single node.

Installation

1. Navigate to the ComfyUI/custom_nodes/ directory.
2. Clone this repository:

   git clone https://github.com/kantan-kanto/ComfyUI-MultiOutputScript

3. Restart ComfyUI.

Key Features

• Multiple inputs: freely combine numeric and text inputs.
• Calculations and logic: supports arithmetic, comparison, and simple conditional branching.
• Multiple outputs: pass results to downstream nodes via separate output ports.
• Safer execution: restricted environment (no file/OS access).

Use Cases

• In Wan2.2 I2V workflows, automatically select a recommended resolution (512×384 or 384×512) based on whether the input image is portrait or landscape.
• Batch-generate file names (e.g., local LLM prompt history, output logs).

Node

Name: MultiOutputScript
Category: utils

UI Ports (Current)

Inputs (connectable):

• in_text_1 (accepts any input; validated as str at runtime)
• in_text_2 (accepts any input; validated as str at runtime)
• in_text_3 (accepts any input; validated as str at runtime)
• in_value_1 (accepts any input; validated as int or float at runtime)
• in_value_2 (accepts any input; validated as int or float at runtime)
• in_value_3 (accepts any input; validated as int or float at runtime)
• code (multiline string)

Outputs:

• out_text_1 (STRING)
• out_text_2 (STRING)
• out_text_3 (STRING)
• out_value_1 (INT)
• out_value_2 (INT)
• out_value_3 (INT)

Notes on numeric outputs:

• Outputs are INT.
• If a value is a float, the fractional part is truncated on output.
• If you prefer rounding or ceiling, handle it in the script (e.g., round(...), math.ceil(...)).

Script Variables

Use the following variables inside code:

• Inputs: it1, it2, it3, iv1, iv2, iv3
• Outputs: ot1, ot2, ot3, ov1, ov2, ov3

Unassigned outputs default to None.

Script Example

# Example: keep landscape at 512x384, portrait at 384x512
# Connect GetImageSize width/height to in_value_1/in_value_2
# iv1: image width, iv2: image height
w, h = iv1, iv2
ov1, ov2 = (512, 384) if w >= h else (384, 512)

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Execution Environment

The script is executed using:

exec(code, globals_dict, locals_dict)

Allowed builtins

• len, min, max, sum, abs, round
• int, float, str, bool
• sorted, reversed
• enumerate, range, zip, map, filter
• any, all, pow, divmod
• list, dict, tuple

Allowed modules

• random
• datetime
• math

Not allowed

• import statements
• file access (open, etc.)
• OS operations (os, sys)
• re-running eval/exec

Execution Notes

• Using random or datetime makes outputs non-deterministic.
• Type mismatches raise an error and stop execution.

Examples

Demo

Demonstrates running the sample workflow with a landscape image and a portrait image.

Example Workflow

examples/
 ├─ example_workflow.json

License

This project is licensed under the GNU General Public License v3.0.

Copyright (C) 2026 kantan-kanto
GitHub: https://github.com/kantan-kanto

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see https://www.gnu.org/licenses/.

Support

• Issues: Report bugs or request features via GitHub Issues
• Examples: Check examples/ for workflow templates

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Release Notes

1.0.0

• Initial release