Gradio Gallery Docs

New to Gradio? Start here: Getting Started

To install Gradio from main, run the following command:

pip install https://gradio-builds.s3.amazonaws.com/41ef0454dfbf00bd363681b8687037d020079eec/gradio-4.21.0-py3-none-any.whl

*Note: Setting share=True in launch() will not work.

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Gallery

gradio.Gallery(···)

Description

Creates a gallery component that allows displaying a grid of images, and optionally captions. If used as an input, the user can upload images to the gallery. If used as an output, the user can click on individual images to view them at a higher resolution.

Behavior

As input component: Passes the list of images as a list of (image, caption) tuples, or a list of (image, None) tuples if no captions are provided (which is usually the case). The image can be a str file path, a numpy array, or a PIL.Image object depending on type.

Your function should accept one of these types:

def predict(
	value: List[tuple[str, str | None]] | List[tuple[PIL.Image.Image, str | None]] | List[tuple[np.ndarray, str | None]] | None
)
	...

As output component: Expects the function to return a list of images, or list of (image, str caption) tuples. Each image can be a str file path, a numpy array, or a PIL.Image object.

Your function should return one of these types:

def predict(···) -> list[GalleryImageType | CaptionedGalleryImageType] | None
	...	
	return value

Initialization

Parameter	Description
`value` list[np.ndarray \| PIL.Image.Image \| str \| Path \| tuple] \| Callable \| None default: None	List of images to display in the gallery by default. If callable, the function will be called whenever the app loads to set the initial value of the component.
`label` str \| None default: None	The label for this component. Appears above the component 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 is assigned to.
`every` float \| None default: None	If `value` is a callable, run the function 'every' number of seconds while the client connection is open. Has no effect otherwise. The event can be accessed (e.g. to cancel it) via this component's .load_event attribute.
`show_label` bool \| None default: None	if True, will display label.
`container` bool default: True	If True, will place the component in a container - providing some extra padding around the border.
`scale` int \| None default: 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 default: 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.
`visible` bool default: True	If False, component will be hidden.
`elem_id` str \| None default: 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 default: 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 default: 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.
`columns` int \| tuple \| None default: 2	Represents the number of images that should be shown in one row, for each of the six standard screen sizes (<576px, <768px, <992px, <1200px, <1400px, >1400px). If fewer than 6 are given then the last will be used for all subsequent breakpoints
`rows` int \| tuple \| None default: None	Represents the number of rows in the image grid, for each of the six standard screen sizes (<576px, <768px, <992px, <1200px, <1400px, >1400px). If fewer than 6 are given then the last will be used for all subsequent breakpoints
`height` int \| float \| None default: None	The height of the gallery component, specified in pixels if a number is passed, or in CSS units if a string is passed. If more images are displayed than can fit in the height, a scrollbar will appear.
`allow_preview` bool default: True	If True, images in the gallery will be enlarged when they are clicked. Default is True.
`preview` bool \| None default: None	If True, Gallery will start in preview mode, which shows all of the images as thumbnails and allows the user to click on them to view them in full size. Only works if allow_preview is True.
`selected_index` int \| None default: None	The index of the image that should be initially selected. If None, no image will be selected at start. If provided, will set Gallery to preview mode unless allow_preview is set to False.
`object_fit` Literal['contain', 'cover', 'fill', 'none', 'scale-down'] \| None default: None	CSS object-fit property for the thumbnail images in the gallery. Can be "contain", "cover", "fill", "none", or "scale-down".
`show_share_button` bool \| None default: None	If True, will show a share icon in the corner of the component that allows user to share outputs to Hugging Face Spaces Discussions. If False, icon does not appear. If set to None (default behavior), then the icon appears if this Gradio app is launched on Spaces, but not otherwise.
`show_download_button` bool \| None default: True	If True, will show a download button in the corner of the selected image. If False, the icon does not appear. Default is True.
`interactive` bool \| None default: None	If True, the gallery will be interactive, allowing the user to upload images. If False, the gallery will be static. Default is True.
`type` Literal['numpy', 'pil', 'filepath'] default: "filepath"	The format the image is converted to before being passed into the prediction function. "numpy" converts the image to a numpy array with shape (height, width, 3) and values from 0 to 255, "pil" converts the image to a PIL image object, "filepath" passes a str path to a temporary file containing the image. If the image is SVG, the `type` is ignored and the filepath of the SVG is returned.

Shortcuts

Class	Interface String Shortcut	Initialization
`gradio.Gallery`	"gallery"	Uses default values

Demos

# This demo needs to be run from the repo folder.
# python demo/fake_gan/run.py
import random

import gradio as gr


def fake_gan():
    images = [
        (random.choice(
            [
                "http://www.marketingtool.online/en/face-generator/img/faces/avatar-1151ce9f4b2043de0d2e3b7826127998.jpg",
                "http://www.marketingtool.online/en/face-generator/img/faces/avatar-116b5e92936b766b7fdfc242649337f7.jpg",
                "http://www.marketingtool.online/en/face-generator/img/faces/avatar-1163530ca19b5cebe1b002b8ec67b6fc.jpg",
                "http://www.marketingtool.online/en/face-generator/img/faces/avatar-1116395d6e6a6581eef8b8038f4c8e55.jpg",
                "http://www.marketingtool.online/en/face-generator/img/faces/avatar-11319be65db395d0e8e6855d18ddcef0.jpg",
            ]
        ), f"label {i}")
        for i in range(3)
    ]
    return images


with gr.Blocks() as demo:
    gallery = gr.Gallery(
        label="Generated images", show_label=False, elem_id="gallery"
    , columns=[3], rows=[1], object_fit="contain", height="auto")
    btn = gr.Button("Generate images", scale=0)

    btn.click(fake_gan, None, gallery)

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

Event Listeners

Description

Event listeners allow you to capture and respond to user interactions with the UI components you've defined in a Gradio Blocks app. When a user interacts with an element, such as changing a slider value or uploading an image, a function is called.

Supported Event Listeners

The Gallery component supports the following event listeners. Each event listener takes the same parameters, which are listed in the Event Arguments table below.

Listener	Description
`gradio.Gallery.select(fn, ···)`	Event listener for when the user selects or deselects the Gallery. Uses event data gradio.SelectData to carry `value` referring to the label of the Gallery, and `selected` to refer to state of the Gallery. See EventData documentation on how to use this event data
`gradio.Gallery.upload(fn, ···)`	This listener is triggered when the user uploads a file into the Gallery.
`gradio.Gallery.change(fn, ···)`	Triggered when the value of the Gallery 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.

Event Arguments

Parameter	Description
`fn` Callable \| None \| Literal['decorator'] default: "decorator"	the function to call when this event is triggered. Often a machine learning model's prediction function. Each parameter of the function corresponds to one input component, and the function should return a single value or a tuple of values, with each element in the tuple corresponding to one output component.
`inputs` Component \| list[Component] \| set[Component] \| None default: None	List of gradio.components to use as inputs. If the function takes no inputs, this should be an empty list.
`outputs` Component \| list[Component] \| None default: None	List of gradio.components to use as outputs. If the function returns no outputs, this should be an empty list.
`api_name` str \| None \| Literal[False] default: None	defines how the endpoint appears in the API docs. Can be a string, None, or False. If set to a string, the endpoint will be exposed in the API docs with the given name. If None (default), the name of the function will be used as the API endpoint. If False, the endpoint will not be exposed in the API docs and downstream apps (including those that `gr.load` this app) will not be able to use this event.
`scroll_to_output` bool default: False	If True, will scroll to output component on completion
`show_progress` Literal['full', 'minimal', 'hidden'] default: "full"	If True, will show progress animation while pending
`queue` bool \| None default: None	If True, will place the request on the queue, if the queue has been enabled. If False, will not put this event on the queue, even if the queue has been enabled. If None, will use the queue setting of the gradio app.
`batch` bool default: False	If True, then the function should process a batch of inputs, meaning that it should accept a list of input values for each parameter. The lists should be of equal length (and be up to length `max_batch_size`). The function is then required to return a tuple of lists (even if there is only 1 output component), with each list in the tuple corresponding to one output component.
`max_batch_size` int default: 4	Maximum number of inputs to batch together if this is called from the queue (only relevant if batch=True)
`preprocess` bool default: True	If False, will not run preprocessing of component data before running 'fn' (e.g. leaving it as a base64 string if this method is called with the `Image` component).
`postprocess` bool default: True	If False, will not run postprocessing of component data before returning 'fn' output to the browser.
`cancels` dict[str, Any] \| list[dict[str, Any]] \| None default: None	A list of other events to cancel when this listener is triggered. For example, setting cancels=[click_event] will cancel the click_event, where click_event is the return value of another components .click method. Functions that have not yet run (or generators that are iterating) will be cancelled, but functions that are currently running will be allowed to finish.
`every` float \| None default: None	Run this event 'every' number of seconds while the client connection is open. Interpreted in seconds.
`trigger_mode` Literal['once', 'multiple', 'always_last'] \| None default: None	If "once" (default for all events except `.change()`) would not allow any submissions while an event is pending. If set to "multiple", unlimited submissions are allowed while pending, and "always_last" (default for `.change()` and `.key_up()` events) would allow a second submission after the pending event is complete.
`js` str \| None default: None	Optional frontend js method to run before running 'fn'. Input arguments for js method are values of 'inputs' and 'outputs', return should be a list of values for output components.
`concurrency_limit` int \| None \| Literal['default'] default: "default"	If set, this is the maximum number of this event that can be running simultaneously. Can be set to None to mean no concurrency_limit (any number of this event can be running simultaneously). Set to "default" to use the default concurrency limit (defined by the `default_concurrency_limit` parameter in `Blocks.queue()`, which itself is 1 by default).
`concurrency_id` str \| None default: None	If set, this is the id of the concurrency group. Events with the same concurrency_id will be limited by the lowest set concurrency_limit.
`show_api` bool default: True	whether to show this event in the "view API" page of the Gradio app, or in the ".view_api()" method of the Gradio clients. Unlike setting api_name to False, setting show_api to False will still allow downstream apps to use this event. If fn is None, show_api will automatically be set to False.

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Gallery

Description
Behavior
Initialization
Shortcuts
Demos
Event Listeners