gradio-chessboard 0.0.8

Gradio component for chessboard interaction

---

tags: [gradio-custom-component, custom-component-track, chess, chessboard, games] title: gradio_chessboard emoji: ♟️ short_description: Gradio component for chessboard interaction colorFrom: blue colorTo: yellow sdk: gradio pinned: false app_file: space.py

gradio_chessboard

Gradio component for chessboard interaction

Installation

pip install gradio_chessboard

Usage

import random

import chess
import gradio as gr
from gradio_chessboard import Chessboard


def random_move(fen: str) -> str:
    board = chess.Board(fen)
    moves = list(board.legal_moves)
    if not moves:
        return fen
    move = random.choice(moves)
    board.push(move)
    return board.fen()


with gr.Blocks() as demo:
    gr.Markdown("# Play Chess with Gradio Chessboard")
    gr.Markdown(
        "This is a demo of the Gradio Chessboard component. You can play chess on it or use it to edit the position."
    )
    chessboard = Chessboard(label="Board", game_mode=True)
    chessboard.move(random_move, chessboard, chessboard)


if __name__ == "__main__":
    demo.launch()

Chessboard

Initialization

name	type	default	description
value	str | Callable | None	None	default fen. If a function is provided, the function will be called each time the app loads to set the initial value of this component.
label	str | I18nData | None	None	the label for this component, displayed above the component if `show_label` is `True` and is also used as the header if there are a table of examples for this component. If None and used in a `gr.Interface`, the label will be the name of the parameter this component corresponds to.
every	Timer | float | None	None	Continously calls `value` to recalculate it if `value` is a function (has no effect otherwise). Can provide a Timer whose tick resets `value`, or a float that provides the regular interval for the reset Timer.
inputs	Component | Sequence[Component] | set[Component] | None	None	Components that are used as inputs to calculate `value` if `value` is a function (has no effect otherwise). `value` is recalculated any time the inputs change.
show_label	bool | None	None	if True, will display label.
scale	int | None	None	relative size compared to adjacent Components. For example if Components A and B are in a Row, and A has scale=2, and B has scale=1, A will be twice as wide as B. Should be an integer. scale applies in Rows, and to top-level Components in Blocks where fill_height=True.
min_width	int	160	minimum pixel width, will wrap if not sufficient screen space to satisfy this value. If a certain scale value results in this Component being narrower than min_width, the min_width parameter will be respected first.
interactive	bool | None	None	if True, will be rendered as a draggable chessboard; if False, dragging will be disabled. If not provided, this is inferred based on whether the component is used as an input or output.
visible	bool	True	If False, component will be hidden.
elem_id	str | None	None	An optional string that is assigned as the id of this component in the HTML DOM. Can be used for targeting CSS styles.
elem_classes	list[str] | str | None	None	An optional list of strings that are assigned as the classes of this component in the HTML DOM. Can be used for targeting CSS styles.
render	bool	True	If False, component will not render be rendered in the Blocks context. Should be used if the intention is to assign event listeners now but render the component later.
key	int | str | tuple[int | str, ...] | None	None	in a gr.render, Components with the same key across re-renders are treated as the same component, not a new component. Properties set in 'preserved_by_key' are not reset across a re-render.
preserved_by_key	list[str] | str | None	"value"	A list of parameters from this component's constructor. Inside a gr.render() function, if a component is re-rendered with the same key, these (and only these) parameters will be preserved in the UI (if they have been changed by the user or an event listener) instead of re-rendered based on the values provided during constructor.
game_mode	bool	False	if True, the chessboard will be rendered in game mode, allowing users to play chess on it. If False, it will be rendered in edit mode, allowing users to edit the chessboard without playing. Defaults to False.
orientation	Literal["white", "black"]	"white"	the orientation of the chessboard, either "white" or "black". Defaults to "white".

Events

name	description
submit	This listener is triggered when the user presses the Enter key while the Chessboard is focused.
change	Triggered when the value of the Chessboard changes either because of user input (e.g. a user types in a textbox) OR because of a function update (e.g. an image receives a value from the output of an event trigger). See .input() for a listener that is only triggered by user input.
move	Event triggered when a move is made on the chessboard in game mode.

User function

The impact on the users predict function varies depending on whether the component is used as an input or output for an event (or both).

• When used as an Input, the component only impacts the input signature of the user function.
• When used as an output, the component only impacts the return signature of the user function.

The code snippet below is accurate in cases where the component is used as both an input and an output.

• As output: Is passed, a FEN string representing the chessboard state if payload is provided, otherwise None.
• As input: Should return, fEN string representing the chessboard state, or None if no value is provided.

def predict(
    value: str | None
) -> str | None:
    return value