bugltd-ComfyLab-Pack/wiki/node reference/format.md

Node reference: Format (String / Multiline)

>> Link to the tutorials

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
• a guide with different techniques (padding, ...)
• format specification mini-language (python.org)

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