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Update docs/Extensions.md

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@ -33,26 +33,26 @@ script.py may define the special functions and variables below.
#### Predefined functions
The following functions may be defined in `script.py`:
| Function | Description |
|-------------|-------------|
| `def ui()` | Creates custom gradio elements when the UI is launched. |
| `def custom_css()` | Returns custom CSS as a string. |
| `def custom_js()` | Returns custom javascript as a string. |
| `def custom_css()` | Returns custom CSS as a string. It is applied whenever the web UI is loaded. |
| `def custom_js()` | Same as above but for javascript. |
| `def input_modifier(string)` | Modifies the input string before it enters the model. In chat mode, it is applied to the user message. Otherwise, it is applied to the entire prompt. |
| `def output_modifier(string)` | Modifies the output string before it is presented in the UI. In chat mode, it is applied to the bot's reply. Otherwise, it is applied to the entire output. |
| `def state_modifier(state)` | Modifies the dictionary containing the UI input parameters before it is used by the text generation functions. |
| `def bot_prefix_modifier(string)` | Applied in chat mode to the prefix for the bot's reply (more on that below). |
| `def bot_prefix_modifier(string)` | Applied in chat mode to the prefix for the bot's reply. |
| `def custom_generate_reply(...)` | Overrides the main text generation function. |
| `def custom_generate_chat_prompt(...)` | Overrides the prompt generator in chat mode. |
| `def tokenizer_modifier(state, prompt, input_ids, input_embeds)` | Modifies the `input_ids`/`input_embeds` fed to the model. Should return `prompt`, `input_ids`, `input_embeds`. See `multimodal` extension for an example |
| `def custom_tokenized_length(prompt)` | Used in conjunction with `tokenizer_modifier`, returns the length in tokens of `prompt`. See `multimodal` extension for an example |
Additionally, the script may define two special global variables:
| `def tokenizer_modifier(state, prompt, input_ids, input_embeds)` | Modifies the `input_ids`/`input_embeds` fed to the model. Should return `prompt`, `input_ids`, `input_embeds`. See the `multimodal` extension for an example. |
| `def custom_tokenized_length(prompt)` | Used in conjunction with `tokenizer_modifier`, returns the length in tokens of `prompt`. See the `multimodal` extension for an example. |
#### `params` dictionary
In this dictionary, `display_name` is used to define the displayed name of the extension in the UI, and `is_tab` is used to define whether the extension should appear in a new tab. By default, extensions appear at the bottom of the "Text generation" tab.
Example:
```python
params = {
"display_name": "Google Translate",
@ -60,9 +60,7 @@ params = {
}
```
`display_name` is used to define the displayed name of the extension in the UI, and `is_tab` is used to define whether the extension should appear in a new tab. By default, extensions appear at the bottom of the "Text generation" tab.
Additionally, `params` may contain variables that you want to be customizable through a `settings.json` file. For instance, assuming the extension is in `extensions/google_translate`, the variable `language string` below:
Additionally, `params` may contain variables that you want to be customizable through a `settings.json` file. For instance, assuming the extension is in `extensions/google_translate`, the variable `language string` in
```python
params = {
@ -92,22 +90,6 @@ This is only relevant in chat mode. If your extension sets `input_hijack['state'
Additionally, your extension can set the value to be a callback, in the form of `def cb(text: str, visible_text: str) -> [str, str]`. See the `multimodal` extension above for an example.
## The `bot_prefix_modifier`
In chat mode, this function modifies the prefix for a new bot message. For instance, if your bot is named `Marie Antoinette`, the default prefix for a new message will be
```
Marie Antoinette:
```
Using `bot_prefix_modifier`, you can change it to:
```
Marie Antoinette: *I am very enthusiastic*
```
Marie Antoinette will become very enthusiastic in all her messages.
## Using multiple extensions at the same time
In order to use your extension, you must start the web UI with the `--extensions` flag followed by the name of your extension (the folder under `text-generation-webui/extension` where `script.py` resides).
@ -128,6 +110,22 @@ Do note, that for:
only the first declaration encountered will be used and the rest will be ignored.
## The `bot_prefix_modifier`
In chat mode, this function modifies the prefix for a new bot message. For instance, if your bot is named `Marie Antoinette`, the default prefix for a new message will be
```
Marie Antoinette:
```
Using `bot_prefix_modifier`, you can change it to:
```
Marie Antoinette: *I am very enthusiastic*
```
Marie Antoinette will become very enthusiastic in all her messages.
## `custom_generate_reply` example
Once defined in a `script.py`, this function is executed in place of the main generation functions. You can use it to connect the web UI to an external API, or to load a custom model that is not supported yet.