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Bug, Ltd. 9dcf6660de new list utility nodes (#13)
* add List-related nodes for Checkpoints / LoRAs / Samplers/ Schedulers
* wiki: reorg XY Plot 3rd tutorial and add example
* bump version
2025-01-29 11:18:14 +01:00

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# Node reference: Format (String / Multiline)
**[>> Link to the tutorials](../tutorials/Format/)**
## Overview
The `Format` nodes are very simple yet powerful nodes, that are based on the **standard Python string `format()` method**.\
They exist in 2 flavors: `String` or `Multiline`.
They are useful to create a string from a template, and **any number of inputs**.
> [!NOTE]
> Inputs can be of the following ComfyUI types: `STRING`, `INT`, `FLOAT`, `BOOLEAN`.
## How to use
Here we will just cover the most basic usage, but please note that Python string `format()` allows to do very interesting things, beyond the standard string replacement: padding, truncating, ...
### Simple usage
The node takes any number of inputs, that are automatically incremented: `arg0`, `arg1`, ...
Given the following template: `first arg by name: {arg0}, second by index: {1}`, and 2 input strings (`tata` and `toto`), we will get the resulting string: `first arg by name: tata, second by index: toto`.
Here we see that **we can reference the inputs either by their name (`argN`), or by their index (starting at 0)**.\
Straightforward, isn't it?
> [!TIP]
> This way, it's **very simple to concatenate 2 strings, append text to a string, pad / truncate, ... many operations in one single node!**
And last but not least: at stated above, it can take **other types than strings: integer, float, boolean** (and surely others).
### Going further
For more details and complex variations, you can check:
- [the tutorials of the `Format` nodes](../tutorials/Format/)
- [a guide with different techniques (padding, ...)](https://pyformat.info/)
- [format specification mini-language (python.org)](https://docs.python.org/3/library/string.html#format-specification-mini-language)
## Inputs / Widgets / Outputs
### Inputs (unlimited)
| input name | type | description | comment |
| :--------: | :-------------------------: | :---------: | :--------------------------------- |
| arg0 | STRING, INT, FLOAT, BOOLEAN | input value | can also be referenced by index: 0 |
| ... | | | |
| argN | STRING, INT, FLOAT, BOOLEAN | input value | can also be referenced by index: N |
### Widgets
| widget name | type | description | comment |
| :---------: | :----: | :-------------: | :------ |
| format | STRING | template string | |
### Outputs
| output name | type | description | comment |
| :---------: | :----: | :------------------------: | :------ |
| formatted | STRING | result string after format | |