ComfyUI-Regex-Runner

A ComfyUI custom node plugin that allows you to run regular expression operations directly in ComfyUI workflows.

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This custom node is powered by ltdrdata and developed by Cursor

Features

• Execute regex matching and replacement in ComfyUI
• Support all standard Python regular expression syntax
• Easy text input and output handling
• Fully integrated into ComfyUI workflows

Installation

1. Navigate to your ComfyUI custom nodes directory:

cd ComfyUI/custom_nodes/

2. Clone this repository:

git clone https://github.com/ltdrdata/ComfyUI-Regex-Runner

Usage

Available Nodes

The plugin provides the following nodes:

• Regex Match: Performs regular expression matching operations
• Regex Replace: Performs regular expression replacement operations

Node Parameters

Regex Match Node

• text: Input text to match
• pattern: Regular expression pattern
• flags: Regex flags (optional)
• Output: List of matched texts

Regex Replace Node

• text: Input text to process
• pattern: Regular expression pattern
• replacement: Replacement text
• flags: Regex flags (optional)
• Output: Replaced text

Examples

1. Extract Numbers

Input text: "Image size is 512x512"
Pattern: "\d+"
Output: ["512", "512"]

2. Replace Text

Input text: "prompt: a cat"
Pattern: "^prompt: "
Replacement: "negative prompt: "
Output: "negative prompt: a cat"

Common Issues

1. Regex Not Matching?

   • Check if the regex syntax is correct
   • Verify if you need to use raw strings (r"pattern")
   • Ensure special characters are properly escaped

2. How to Use Regex Flags?

   • Supports standard Python regex flags
   • Examples: re.IGNORECASE, re.MULTILINE, etc.

License

MIT License

Support

If you encounter any issues or have suggestions for improvements:

1. Submit an issue on GitHub
2. Provide detailed problem description and steps to reproduce
3. Include relevant error messages and logs