text
stringlengths 0
2k
| heading1
stringlengths 4
79
| source_page_url
stringclasses 179
values | source_page_title
stringclasses 179
values |
|---|---|---|---|
For private Google Sheets, the process requires a little more work, but not that much! The key difference is that now, you must authenticate yourself to authorize access to the private Google Sheets.
Authentication
To authenticate yourself, obtain credentials from Google Cloud. Here's [how to set up google cloud credentials](https://developers.google.com/workspace/guides/create-credentials):
1\. First, log in to your Google Cloud account and go to the Google Cloud Console (https://console.cloud.google.com/)
2\. In the Cloud Console, click on the hamburger menu in the top-left corner and select "APIs & Services" from the menu. If you do not have an existing project, you will need to create one.
3\. Then, click the "+ Enabled APIs & services" button, which allows you to enable specific services for your project. Search for "Google Sheets API", click on it, and click the "Enable" button. If you see the "Manage" button, then Google Sheets is already enabled, and you're all set.
4\. In the APIs & Services menu, click on the "Credentials" tab and then click on the "Create credentials" button.
5\. In the "Create credentials" dialog, select "Service account key" as the type of credentials to create, and give it a name. **Note down the email of the service account**
6\. After selecting the service account, select the "JSON" key type and then click on the "Create" button. This will download the JSON key file containing your credentials to your computer. It will look something like this:
```json
{
"type": "service_account",
"project_id": "your project",
"private_key_id": "your private key id",
"private_key": "private key",
"client_email": "email",
"client_id": "client id",
"auth_uri": "https://accounts.google.com/o/oauth2/auth",
"token_uri": "https://accounts.google.com/o/oauth2/token",
"auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
"client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/email_id"
}
```
|
Private Google Sheets
|
https://gradio.app/guides/creating-a-realtime-dashboard-from-google-sheets
|
Other Tutorials - Creating A Realtime Dashboard From Google Sheets Guide
|
google.com/o/oauth2/token",
"auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
"client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/email_id"
}
```
Querying
Once you have the credentials `.json` file, you can use the following steps to query your Google Sheet:
1\. Click on the "Share" button in the top-right corner of the Google Sheet. Share the Google Sheets with the email address of the service from Step 5 of authentication subsection (this step is important!). Then click on the "Get shareable link" button. This will give you a URL that looks something like this:
```html
https://docs.google.com/spreadsheets/d/1UoKzzRzOCt-FXLLqDKLbryEKEgllGAQUEJ5qtmmQwpU/editgid=0
```
2\. Install the [`gspread` library](https://docs.gspread.org/en/v5.7.0/), which makes it easy to work with the [Google Sheets API](https://developers.google.com/sheets/api/guides/concepts) in Python by running in the terminal: `pip install gspread`
3\. Write a function to load the data from the Google Sheet, like this (replace the `URL` variable with the URL of your private Google Sheet):
```python
import gspread
import pandas as pd
Authenticate with Google and get the sheet
URL = 'https://docs.google.com/spreadsheets/d/1_91Vps76SKOdDQ8cFxZQdgjTJiz23375sAT7vPvaj4k/editgid=0'
gc = gspread.service_account("path/to/key.json")
sh = gc.open_by_url(URL)
worksheet = sh.sheet1
def get_data():
values = worksheet.get_all_values()
df = pd.DataFrame(values[1:], columns=values[0])
return df
```
4\. The data query is a function, which means that it's easy to display it real-time using the `gr.DataFrame` component, or plot it real-time using the `gr.LinePlot` component (of course, depending on the data, a different plot may be appropriate). To do this, we just pass the function into the respective components, and set the `every` parameter based on how frequently (in seconds) we would like the component to refresh. Here's the Gradio cod
|
Private Google Sheets
|
https://gradio.app/guides/creating-a-realtime-dashboard-from-google-sheets
|
Other Tutorials - Creating A Realtime Dashboard From Google Sheets Guide
|
. To do this, we just pass the function into the respective components, and set the `every` parameter based on how frequently (in seconds) we would like the component to refresh. Here's the Gradio code:
```python
import gradio as gr
with gr.Blocks() as demo:
gr.Markdown("📈 Real-Time Line Plot")
with gr.Row():
with gr.Column():
gr.DataFrame(get_data, every=gr.Timer(5))
with gr.Column():
gr.LinePlot(get_data, every=gr.Timer(5), x="Date", y="Sales", y_title="Sales ($ millions)", overlay_point=True, width=500, height=500)
demo.queue().launch() Run the demo with queuing enabled
```
You now have a Dashboard that refreshes every 5 seconds, pulling the data from your Google Sheet.
|
Private Google Sheets
|
https://gradio.app/guides/creating-a-realtime-dashboard-from-google-sheets
|
Other Tutorials - Creating A Realtime Dashboard From Google Sheets Guide
|
And that's all there is to it! With just a few lines of code, you can use `gradio` and other libraries to read data from a public or private Google Sheet and then display and plot the data in a real-time dashboard.
|
Conclusion
|
https://gradio.app/guides/creating-a-realtime-dashboard-from-google-sheets
|
Other Tutorials - Creating A Realtime Dashboard From Google Sheets Guide
|
Let's go through a simple example to understand how to containerize a Gradio app using Docker.
Step 1: Create Your Gradio App
First, we need a simple Gradio app. Let's create a Python file named `app.py` with the following content:
```python
import gradio as gr
def greet(name):
return f"Hello {name}!"
iface = gr.Interface(fn=greet, inputs="text", outputs="text").launch()
```
This app creates a simple interface that greets the user by name.
Step 2: Create a Dockerfile
Next, we'll create a Dockerfile to specify how our app should be built and run in a Docker container. Create a file named `Dockerfile` in the same directory as your app with the following content:
```dockerfile
FROM python:3.10-slim
WORKDIR /usr/src/app
COPY . .
RUN pip install --no-cache-dir gradio
EXPOSE 7860
ENV GRADIO_SERVER_NAME="0.0.0.0"
CMD ["python", "app.py"]
```
This Dockerfile performs the following steps:
- Starts from a Python 3.10 slim image.
- Sets the working directory and copies the app into the container.
- Installs Gradio (you should install all other requirements as well).
- Exposes port 7860 (Gradio's default port).
- Sets the `GRADIO_SERVER_NAME` environment variable to ensure Gradio listens on all network interfaces.
- Specifies the command to run the app.
Step 3: Build and Run Your Docker Container
With the Dockerfile in place, you can build and run your container:
```bash
docker build -t gradio-app .
docker run -p 7860:7860 gradio-app
```
Your Gradio app should now be accessible at `http://localhost:7860`.
|
How to Dockerize a Gradio App
|
https://gradio.app/guides/deploying-gradio-with-docker
|
Other Tutorials - Deploying Gradio With Docker Guide
|
When running Gradio applications in Docker, there are a few important things to keep in mind:
Running the Gradio app on `"0.0.0.0"` and exposing port 7860
In the Docker environment, setting `GRADIO_SERVER_NAME="0.0.0.0"` as an environment variable (or directly in your Gradio app's `launch()` function) is crucial for allowing connections from outside the container. And the `EXPOSE 7860` directive in the Dockerfile tells Docker to expose Gradio's default port on the container to enable external access to the Gradio app.
Enable Stickiness for Multiple Replicas
When deploying Gradio apps with multiple replicas, such as on AWS ECS, it's important to enable stickiness with `sessionAffinity: ClientIP`. This ensures that all requests from the same user are routed to the same instance. This is important because Gradio's communication protocol requires multiple separate connections from the frontend to the backend in order for events to be processed correctly. (If you use Terraform, you'll want to add a [stickiness block](https://registry.terraform.io/providers/hashicorp/aws/3.14.1/docs/resources/lb_target_groupstickiness) into your target group definition.)
Deploying Behind a Proxy
If you're deploying your Gradio app behind a proxy, like Nginx, it's essential to configure the proxy correctly. Gradio provides a [Guide that walks through the necessary steps](https://www.gradio.app/guides/running-gradio-on-your-web-server-with-nginx). This setup ensures your app is accessible and performs well in production environments.
|
Important Considerations
|
https://gradio.app/guides/deploying-gradio-with-docker
|
Other Tutorials - Deploying Gradio With Docker Guide
|
Tabular data science is the most widely used domain of machine learning, with problems ranging from customer segmentation to churn prediction. Throughout various stages of the tabular data science workflow, communicating your work to stakeholders or clients can be cumbersome; which prevents data scientists from focusing on what matters, such as data analysis and model building. Data scientists can end up spending hours building a dashboard that takes in dataframe and returning plots, or returning a prediction or plot of clusters in a dataset. In this guide, we'll go through how to use `gradio` to improve your data science workflows. We will also talk about how to use `gradio` and [skops](https://skops.readthedocs.io/en/stable/) to build interfaces with only one line of code!
Prerequisites
Make sure you have the `gradio` Python package already [installed](/getting_started).
|
Introduction
|
https://gradio.app/guides/using-gradio-for-tabular-workflows
|
Other Tutorials - Using Gradio For Tabular Workflows Guide
|
We will take a look at how we can create a simple UI that predicts failures based on product information.
```python
import gradio as gr
import pandas as pd
import joblib
import datasets
inputs = [gr.Dataframe(row_count = (2, "dynamic"), col_count=(4,"dynamic"), label="Input Data", interactive=1)]
outputs = [gr.Dataframe(row_count = (2, "dynamic"), col_count=(1, "fixed"), label="Predictions", headers=["Failures"])]
model = joblib.load("model.pkl")
we will give our dataframe as example
df = datasets.load_dataset("merve/supersoaker-failures")
df = df["train"].to_pandas()
def infer(input_dataframe):
return pd.DataFrame(model.predict(input_dataframe))
gr.Interface(fn = infer, inputs = inputs, outputs = outputs, examples = [[df.head(2)]]).launch()
```
Let's break down above code.
- `fn`: the inference function that takes input dataframe and returns predictions.
- `inputs`: the component we take our input with. We define our input as dataframe with 2 rows and 4 columns, which initially will look like an empty dataframe with the aforementioned shape. When the `row_count` is set to `dynamic`, you don't have to rely on the dataset you're inputting to pre-defined component.
- `outputs`: The dataframe component that stores outputs. This UI can take single or multiple samples to infer, and returns 0 or 1 for each sample in one column, so we give `row_count` as 2 and `col_count` as 1 above. `headers` is a list made of header names for dataframe.
- `examples`: You can either pass the input by dragging and dropping a CSV file, or a pandas DataFrame through examples, which headers will be automatically taken by the interface.
We will now create an example for a minimal data visualization dashboard. You can find a more comprehensive version in the related Spaces.
<gradio-app space="gradio/tabular-playground"></gradio-app>
```python
import gradio as gr
import pandas as pd
import datasets
import seaborn as sns
import matplotlib.pyplot as plt
df = datasets.load_dataset
|
Let's Create a Simple Interface!
|
https://gradio.app/guides/using-gradio-for-tabular-workflows
|
Other Tutorials - Using Gradio For Tabular Workflows Guide
|
app space="gradio/tabular-playground"></gradio-app>
```python
import gradio as gr
import pandas as pd
import datasets
import seaborn as sns
import matplotlib.pyplot as plt
df = datasets.load_dataset("merve/supersoaker-failures")
df = df["train"].to_pandas()
df.dropna(axis=0, inplace=True)
def plot(df):
plt.scatter(df.measurement_13, df.measurement_15, c = df.loading,alpha=0.5)
plt.savefig("scatter.png")
df['failure'].value_counts().plot(kind='bar')
plt.savefig("bar.png")
sns.heatmap(df.select_dtypes(include="number").corr())
plt.savefig("corr.png")
plots = ["corr.png","scatter.png", "bar.png"]
return plots
inputs = [gr.Dataframe(label="Supersoaker Production Data")]
outputs = [gr.Gallery(label="Profiling Dashboard", columns=(1,3))]
gr.Interface(plot, inputs=inputs, outputs=outputs, examples=[df.head(100)], title="Supersoaker Failures Analysis Dashboard").launch()
```
<gradio-app space="gradio/gradio-analysis-dashboard-minimal"></gradio-app>
We will use the same dataset we used to train our model, but we will make a dashboard to visualize it this time.
- `fn`: The function that will create plots based on data.
- `inputs`: We use the same `Dataframe` component we used above.
- `outputs`: The `Gallery` component is used to keep our visualizations.
- `examples`: We will have the dataset itself as the example.
|
Let's Create a Simple Interface!
|
https://gradio.app/guides/using-gradio-for-tabular-workflows
|
Other Tutorials - Using Gradio For Tabular Workflows Guide
|
`skops` is a library built on top of `huggingface_hub` and `sklearn`. With the recent `gradio` integration of `skops`, you can build tabular data interfaces with one line of code!
```python
import gradio as gr
title and description are optional
title = "Supersoaker Defective Product Prediction"
description = "This model predicts Supersoaker production line failures. Drag and drop any slice from dataset or edit values as you wish in below dataframe component."
gr.load("huggingface/scikit-learn/tabular-playground", title=title, description=description).launch()
```
<gradio-app space="gradio/gradio-skops-integration"></gradio-app>
`sklearn` models pushed to Hugging Face Hub using `skops` include a `config.json` file that contains an example input with column names, the task being solved (that can either be `tabular-classification` or `tabular-regression`). From the task type, `gradio` constructs the `Interface` and consumes column names and the example input to build it. You can [refer to skops documentation on hosting models on Hub](https://skops.readthedocs.io/en/latest/auto_examples/plot_hf_hub.htmlsphx-glr-auto-examples-plot-hf-hub-py) to learn how to push your models to Hub using `skops`.
|
Easily load tabular data interfaces with one line of code using skops
|
https://gradio.app/guides/using-gradio-for-tabular-workflows
|
Other Tutorials - Using Gradio For Tabular Workflows Guide
|
Global state in Gradio apps is very simple: any variable created outside of a function is shared globally between all users.
This makes managing global state very simple and without the need for external services. For example, in this application, the `visitor_count` variable is shared between all users
```py
import gradio as gr
Shared between all users
visitor_count = 0
def increment_counter():
global visitor_count
visitor_count += 1
return visitor_count
with gr.Blocks() as demo:
number = gr.Textbox(label="Total Visitors", value="Counting...")
demo.load(increment_counter, inputs=None, outputs=number)
demo.launch()
```
This means that any time you do _not_ want to share a value between users, you should declare it _within_ a function. But what if you need to share values between function calls, e.g. a chat history? In that case, you should use one of the subsequent approaches to manage state.
|
Global State
|
https://gradio.app/guides/state-in-blocks
|
Building With Blocks - State In Blocks Guide
|
Gradio supports session state, where data persists across multiple submits within a page session. To reiterate, session data is _not_ shared between different users of your model, and does _not_ persist if a user refreshes the page to reload the Gradio app. To store data in a session state, you need to do three things:
1. Create a `gr.State()` object. If there is a default value to this stateful object, pass that into the constructor. Note that `gr.State` objects must be [deepcopy-able](https://docs.python.org/3/library/copy.html), otherwise you will need to use a different approach as described below.
2. In the event listener, put the `State` object as an input and output as needed.
3. In the event listener function, add the variable to the input parameters and the return value.
Let's take a look at a simple example. We have a simple checkout app below where you add items to a cart. You can also see the size of the cart.
$code_simple_state
Notice how we do this with state:
1. We store the cart items in a `gr.State()` object, initialized here to be an empty list.
2. When adding items to the cart, the event listener uses the cart as both input and output - it returns the updated cart with all the items inside.
3. We can attach a `.change` listener to cart, that uses the state variable as input as well.
You can think of `gr.State` as an invisible Gradio component that can store any kind of value. Here, `cart` is not visible in the frontend but is used for calculations.
The `.change` listener for a state variable triggers after any event listener changes the value of a state variable. If the state variable holds a sequence (like a `list`, `set`, or `dict`), a change is triggered if any of the elements inside change. If it holds an object or primitive, a change is triggered if the **hash** of the value changes. So if you define a custom class and create a `gr.State` variable that is an instance of that class, make sure that the the class includes a sensible `__
|
Session State
|
https://gradio.app/guides/state-in-blocks
|
Building With Blocks - State In Blocks Guide
|
riggered if the **hash** of the value changes. So if you define a custom class and create a `gr.State` variable that is an instance of that class, make sure that the the class includes a sensible `__hash__` implementation.
The value of a session State variable is cleared when the user refreshes the page. The value is stored on in the app backend for 60 minutes after the user closes the tab (this can be configured by the `delete_cache` parameter in `gr.Blocks`).
Learn more about `State` in the [docs](https://gradio.app/docs/gradio/state).
**What about objects that cannot be deepcopied?**
As mentioned earlier, the value stored in `gr.State` must be [deepcopy-able](https://docs.python.org/3/library/copy.html). If you are working with a complex object that cannot be deepcopied, you can take a different approach to manually read the user's `session_hash` and store a global `dictionary` with instances of your object for each user. Here's how you would do that:
```py
import gradio as gr
class NonDeepCopyable:
def __init__(self):
from threading import Lock
self.counter = 0
self.lock = Lock() Lock objects cannot be deepcopied
def increment(self):
with self.lock:
self.counter += 1
return self.counter
Global dictionary to store user-specific instances
instances = {}
def initialize_instance(request: gr.Request):
instances[request.session_hash] = NonDeepCopyable()
return "Session initialized!"
def cleanup_instance(request: gr.Request):
if request.session_hash in instances:
del instances[request.session_hash]
def increment_counter(request: gr.Request):
if request.session_hash in instances:
instance = instances[request.session_hash]
return instance.increment()
return "Error: Session not initialized"
with gr.Blocks() as demo:
output = gr.Textbox(label="Status")
counter = gr.Number(label="Counter Value")
increment_btn = gr.Button("Increment Co
|
Session State
|
https://gradio.app/guides/state-in-blocks
|
Building With Blocks - State In Blocks Guide
|
return "Error: Session not initialized"
with gr.Blocks() as demo:
output = gr.Textbox(label="Status")
counter = gr.Number(label="Counter Value")
increment_btn = gr.Button("Increment Counter")
increment_btn.click(increment_counter, inputs=None, outputs=counter)
Initialize instance when page loads
demo.load(initialize_instance, inputs=None, outputs=output)
Clean up instance when page is closed/refreshed
demo.unload(cleanup_instance)
demo.launch()
```
|
Session State
|
https://gradio.app/guides/state-in-blocks
|
Building With Blocks - State In Blocks Guide
|
Gradio also supports browser state, where data persists in the browser's localStorage even after the page is refreshed or closed. This is useful for storing user preferences, settings, API keys, or other data that should persist across sessions. To use local state:
1. Create a `gr.BrowserState` object. You can optionally provide an initial default value and a key to identify the data in the browser's localStorage.
2. Use it like a regular `gr.State` component in event listeners as inputs and outputs.
Here's a simple example that saves a user's username and password across sessions:
$code_browserstate
Note: The value stored in `gr.BrowserState` does not persist if the Grado app is restarted. To persist it, you can hardcode specific values of `storage_key` and `secret` in the `gr.BrowserState` component and restart the Gradio app on the same server name and server port. However, this should only be done if you are running trusted Gradio apps, as in principle, this can allow one Gradio app to access localStorage data that was created by a different Gradio app.
|
Browser State
|
https://gradio.app/guides/state-in-blocks
|
Building With Blocks - State In Blocks Guide
|
Elements within a `with gr.Row` clause will all be displayed horizontally. For example, to display two Buttons side by side:
```python
with gr.Blocks() as demo:
with gr.Row():
btn1 = gr.Button("Button 1")
btn2 = gr.Button("Button 2")
```
You can set every element in a Row to have the same height. Configure this with the `equal_height` argument.
```python
with gr.Blocks() as demo:
with gr.Row(equal_height=True):
textbox = gr.Textbox()
btn2 = gr.Button("Button 2")
```
The widths of elements in a Row can be controlled via a combination of `scale` and `min_width` arguments that are present in every Component.
- `scale` is an integer that defines how an element will take up space in a Row. If scale is set to `0`, the element will not expand to take up space. If scale is set to `1` or greater, the element will expand. Multiple elements in a row will expand proportional to their scale. Below, `btn2` will expand twice as much as `btn1`, while `btn0` will not expand at all:
```python
with gr.Blocks() as demo:
with gr.Row():
btn0 = gr.Button("Button 0", scale=0)
btn1 = gr.Button("Button 1", scale=1)
btn2 = gr.Button("Button 2", scale=2)
```
- `min_width` will set the minimum width the element will take. The Row will wrap if there isn't sufficient space to satisfy all `min_width` values.
Learn more about Rows in the [docs](https://gradio.app/docs/row).
|
Rows
|
https://gradio.app/guides/controlling-layout
|
Building With Blocks - Controlling Layout Guide
|
Components within a Column will be placed vertically atop each other. Since the vertical layout is the default layout for Blocks apps anyway, to be useful, Columns are usually nested within Rows. For example:
$code_rows_and_columns
$demo_rows_and_columns
See how the first column has two Textboxes arranged vertically. The second column has an Image and Button arranged vertically. Notice how the relative widths of the two columns is set by the `scale` parameter. The column with twice the `scale` value takes up twice the width.
Learn more about Columns in the [docs](https://gradio.app/docs/column).
Fill Browser Height / Width
To make an app take the full width of the browser by removing the side padding, use `gr.Blocks(fill_width=True)`.
To make top level Components expand to take the full height of the browser, use `fill_height` and apply scale to the expanding Components.
```python
import gradio as gr
with gr.Blocks(fill_height=True) as demo:
gr.Chatbot(scale=1)
gr.Textbox(scale=0)
```
|
Columns and Nesting
|
https://gradio.app/guides/controlling-layout
|
Building With Blocks - Controlling Layout Guide
|
Some components support setting height and width. These parameters accept either a number (interpreted as pixels) or a string. Using a string allows the direct application of any CSS unit to the encapsulating Block element.
Below is an example illustrating the use of viewport width (vw):
```python
import gradio as gr
with gr.Blocks() as demo:
im = gr.ImageEditor(width="50vw")
demo.launch()
```
|
Dimensions
|
https://gradio.app/guides/controlling-layout
|
Building With Blocks - Controlling Layout Guide
|
You can also create Tabs using the `with gr.Tab('tab_name'):` clause. Any component created inside of a `with gr.Tab('tab_name'):` context appears in that tab. Consecutive Tab clauses are grouped together so that a single tab can be selected at one time, and only the components within that Tab's context are shown.
For example:
$code_blocks_flipper
$demo_blocks_flipper
Also note the `gr.Accordion('label')` in this example. The Accordion is a layout that can be toggled open or closed. Like `Tabs`, it is a layout element that can selectively hide or show content. Any components that are defined inside of a `with gr.Accordion('label'):` will be hidden or shown when the accordion's toggle icon is clicked.
Learn more about [Tabs](https://gradio.app/docs/tab) and [Accordions](https://gradio.app/docs/accordion) in the docs.
|
Tabs and Accordions
|
https://gradio.app/guides/controlling-layout
|
Building With Blocks - Controlling Layout Guide
|
The sidebar is a collapsible panel that renders child components on the left side of the screen and can be expanded or collapsed.
For example:
$code_blocks_sidebar
Learn more about [Sidebar](https://gradio.app/docs/gradio/sidebar) in the docs.
|
Sidebar
|
https://gradio.app/guides/controlling-layout
|
Building With Blocks - Controlling Layout Guide
|
In order to provide a guided set of ordered steps, a controlled workflow, you can use the `Walkthrough` component with accompanying `Step` components.
The `Walkthrough` component has a visual style and user experience tailored for this usecase.
Authoring this component is very similar to `Tab`, except it is the app developers responsibility to progress through each step, by setting the appropriate ID for the parent `Walkthrough` which should correspond to an ID provided to an indvidual `Step`.
$demo_walkthrough
Learn more about [Walkthrough](https://gradio.app/docs/gradio/walkthrough) in the docs.
|
Multi-step walkthroughs
|
https://gradio.app/guides/controlling-layout
|
Building With Blocks - Controlling Layout Guide
|
Both Components and Layout elements have a `visible` argument that can set initially and also updated. Setting `gr.Column(visible=...)` on a Column can be used to show or hide a set of Components.
$code_blocks_form
$demo_blocks_form
|
Visibility
|
https://gradio.app/guides/controlling-layout
|
Building With Blocks - Controlling Layout Guide
|
In some cases, you might want to define components before you actually render them in your UI. For instance, you might want to show an examples section using `gr.Examples` above the corresponding `gr.Textbox` input. Since `gr.Examples` requires as a parameter the input component object, you will need to first define the input component, but then render it later, after you have defined the `gr.Examples` object.
The solution to this is to define the `gr.Textbox` outside of the `gr.Blocks()` scope and use the component's `.render()` method wherever you'd like it placed in the UI.
Here's a full code example:
```python
input_textbox = gr.Textbox()
with gr.Blocks() as demo:
gr.Examples(["hello", "bonjour", "merhaba"], input_textbox)
input_textbox.render()
```
Similarly, if you have already defined a component in a Gradio app, but wish to unrender it so that you can define in a different part of your application, then you can call the `.unrender()` method. In the following example, the `Textbox` will appear in the third column:
```py
import gradio as gr
with gr.Blocks() as demo:
with gr.Row():
with gr.Column():
gr.Markdown("Row 1")
textbox = gr.Textbox()
with gr.Column():
gr.Markdown("Row 2")
textbox.unrender()
with gr.Column():
gr.Markdown("Row 3")
textbox.render()
demo.launch()
```
|
Defining and Rendering Components Separately
|
https://gradio.app/guides/controlling-layout
|
Building With Blocks - Controlling Layout Guide
|
Gradio themes are the easiest way to customize the look and feel of your app. You can choose from a variety of themes, or create your own. To do so, pass the `theme=` kwarg to the `Blocks` constructor. For example:
```python
with gr.Blocks(theme=gr.themes.Glass()):
...
```
Gradio comes with a set of prebuilt themes which you can load from `gr.themes.*`. You can extend these themes or create your own themes from scratch - see the [Theming guide](/guides/theming-guide) for more details.
For additional styling ability, you can pass any CSS to your app as a string using the `css=` kwarg. You can also pass a pathlib.Path to a css file or a list of such paths to the `css_paths=` kwarg.
**Warning**: The use of query selectors in custom JS and CSS is _not_ guaranteed to work across Gradio versions that bind to Gradio's own HTML elements as the Gradio HTML DOM may change. We recommend using query selectors sparingly.
The base class for the Gradio app is `gradio-container`, so here's an example that changes the background color of the Gradio app:
```python
with gr.Blocks(css=".gradio-container {background-color: red}") as demo:
...
```
If you'd like to reference external files in your css, preface the file path (which can be a relative or absolute path) with `"/gradio_api/file="`, for example:
```python
with gr.Blocks(css=".gradio-container {background: url('/gradio_api/file=clouds.jpg')}") as demo:
...
```
Note: By default, most files in the host machine are not accessible to users running the Gradio app. As a result, you should make sure that any referenced files (such as `clouds.jpg` here) are either URLs or [allowed paths, as described here](/main/guides/file-access).
|
Adding custom CSS to your demo
|
https://gradio.app/guides/custom-CSS-and-JS
|
Building With Blocks - Custom Css And Js Guide
|
You can `elem_id` to add an HTML element `id` to any component, and `elem_classes` to add a class or list of classes. This will allow you to select elements more easily with CSS. This approach is also more likely to be stable across Gradio versions as built-in class names or ids may change (however, as mentioned in the warning above, we cannot guarantee complete compatibility between Gradio versions if you use custom CSS as the DOM elements may themselves change).
```python
css = """
warning {background-color: FFCCCB}
.feedback textarea {font-size: 24px !important}
"""
with gr.Blocks(css=css) as demo:
box1 = gr.Textbox(value="Good Job", elem_classes="feedback")
box2 = gr.Textbox(value="Failure", elem_id="warning", elem_classes="feedback")
```
The CSS `warning` ruleset will only target the second Textbox, while the `.feedback` ruleset will target both. Note that when targeting classes, you might need to put the `!important` selector to override the default Gradio styles.
|
The `elem_id` and `elem_classes` Arguments
|
https://gradio.app/guides/custom-CSS-and-JS
|
Building With Blocks - Custom Css And Js Guide
|
There are 3 ways to add javascript code to your Gradio demo:
1. You can add JavaScript code as a string to the `js` parameter of the `Blocks` or `Interface` initializer. This will run the JavaScript code when the demo is first loaded.
Below is an example of adding custom js to show an animated welcome message when the demo first loads.
$code_blocks_js_load
$demo_blocks_js_load
2. When using `Blocks` and event listeners, events have a `js` argument that can take a JavaScript function as a string and treat it just like a Python event listener function. You can pass both a JavaScript function and a Python function (in which case the JavaScript function is run first) or only Javascript (and set the Python `fn` to `None`). Take a look at the code below:
$code_blocks_js_methods
$demo_blocks_js_methods
3. Lastly, you can add JavaScript code to the `head` param of the `Blocks` initializer. This will add the code to the head of the HTML document. For example, you can add Google Analytics to your demo like so:
```python
head = f"""
<script async src="https://www.googletagmanager.com/gtag/js?id={google_analytics_tracking_id}"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){{dataLayer.push(arguments);}}
gtag('js', new Date());
gtag('config', '{google_analytics_tracking_id}');
</script>
"""
with gr.Blocks(head=head) as demo:
gr.HTML("<h1>My App</h1>")
demo.launch()
```
The `head` parameter accepts any HTML tags you would normally insert into the `<head>` of a page. For example, you can also include `<meta>` tags to `head` in order to update the social sharing preview for your Gradio app like this:
```py
import gradio as gr
custom_head = """
<!-- HTML Meta Tags -->
<title>Sample App</title>
<meta name="description" content="An open-source web application showcasing various features and capabilities.">
<!-- Facebook Meta Tags -->
<meta property="og:url" content="https://example.com">
<meta property="og:type" content="webs
|
Adding custom JavaScript to your demo
|
https://gradio.app/guides/custom-CSS-and-JS
|
Building With Blocks - Custom Css And Js Guide
|
n open-source web application showcasing various features and capabilities.">
<!-- Facebook Meta Tags -->
<meta property="og:url" content="https://example.com">
<meta property="og:type" content="website">
<meta property="og:title" content="Sample App">
<meta property="og:description" content="An open-source web application showcasing various features and capabilities.">
<meta property="og:image" content="https://cdn.britannica.com/98/152298-050-8E45510A/Cheetah.jpg">
<!-- Twitter Meta Tags -->
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:creator" content="@example_user">
<meta name="twitter:title" content="Sample App">
<meta name="twitter:description" content="An open-source web application showcasing various features and capabilities.">
<meta name="twitter:image" content="https://cdn.britannica.com/98/152298-050-8E45510A/Cheetah.jpg">
<meta property="twitter:domain" content="example.com">
<meta property="twitter:url" content="https://example.com">
"""
with gr.Blocks(title="My App", head=custom_head) as demo:
gr.HTML("<h1>My App</h1>")
demo.launch()
```
Note that injecting custom JS can affect browser behavior and accessibility (e.g. keyboard shortcuts may be lead to unexpected behavior if your Gradio app is embedded in another webpage). You should test your interface across different browsers and be mindful of how scripts may interact with browser defaults. Here's an example where pressing `Shift + s` triggers the `click` event of a specific `Button` component if the browser focus is _not_ on an input component (e.g. `Textbox` component):
```python
import gradio as gr
shortcut_js = """
<script>
function shortcuts(e) {
var event = document.all ? window.event : e;
switch (e.target.tagName.toLowerCase()) {
case "input":
case "textarea":
break;
default:
if (e.key.toLowerCase() == "s" && e.shiftKey) {
document.getElementById("my_btn").click();
}
}
}
doc
|
Adding custom JavaScript to your demo
|
https://gradio.app/guides/custom-CSS-and-JS
|
Building With Blocks - Custom Css And Js Guide
|
e "input":
case "textarea":
break;
default:
if (e.key.toLowerCase() == "s" && e.shiftKey) {
document.getElementById("my_btn").click();
}
}
}
document.addEventListener('keypress', shortcuts, false);
</script>
"""
with gr.Blocks(head=shortcut_js) as demo:
action_button = gr.Button(value="Name", elem_id="my_btn")
textbox = gr.Textbox()
action_button.click(lambda : "button pressed", None, textbox)
demo.launch()
```
|
Adding custom JavaScript to your demo
|
https://gradio.app/guides/custom-CSS-and-JS
|
Building With Blocks - Custom Css And Js Guide
|
Did you know that apart from being a full-stack machine learning demo, a Gradio Blocks app is also a regular-old python function!?
This means that if you have a gradio Blocks (or Interface) app called `demo`, you can use `demo` like you would any python function.
So doing something like `output = demo("Hello", "friend")` will run the first event defined in `demo` on the inputs "Hello" and "friend" and store it
in the variable `output`.
If I put you to sleep 🥱, please bear with me! By using apps like functions, you can seamlessly compose Gradio apps.
The following section will show how.
|
Introduction
|
https://gradio.app/guides/using-blocks-like-functions
|
Building With Blocks - Using Blocks Like Functions Guide
|
Let's say we have the following demo that translates english text to german text.
$code_english_translator
I already went ahead and hosted it in Hugging Face spaces at [gradio/english_translator](https://huggingface.co/spaces/gradio/english_translator).
You can see the demo below as well:
$demo_english_translator
Now, let's say you have an app that generates english text, but you wanted to additionally generate german text.
You could either:
1. Copy the source code of my english-to-german translation and paste it in your app.
2. Load my english-to-german translation in your app and treat it like a normal python function.
Option 1 technically always works, but it often introduces unwanted complexity.
Option 2 lets you borrow the functionality you want without tightly coupling our apps.
All you have to do is call the `Blocks.load` class method in your source file.
After that, you can use my translation app like a regular python function!
The following code snippet and demo shows how to use `Blocks.load`.
Note that the variable `english_translator` is my english to german app, but its used in `generate_text` like a regular function.
$code_generate_english_german
$demo_generate_english_german
|
Treating Blocks like functions
|
https://gradio.app/guides/using-blocks-like-functions
|
Building With Blocks - Using Blocks Like Functions Guide
|
If the app you are loading defines more than one function, you can specify which function to use
with the `fn_index` and `api_name` parameters.
In the code for our english to german demo, you'll see the following line:
```python
translate_btn.click(translate, inputs=english, outputs=german, api_name="translate-to-german")
```
The `api_name` gives this function a unique name in our app. You can use this name to tell gradio which
function in the upstream space you want to use:
```python
english_generator(text, api_name="translate-to-german")[0]["generated_text"]
```
You can also use the `fn_index` parameter.
Imagine my app also defined an english to spanish translation function.
In order to use it in our text generation app, we would use the following code:
```python
english_generator(text, fn_index=1)[0]["generated_text"]
```
Functions in gradio spaces are zero-indexed, so since the spanish translator would be the second function in my space,
you would use index 1.
|
How to control which function in the app to use
|
https://gradio.app/guides/using-blocks-like-functions
|
Building With Blocks - Using Blocks Like Functions Guide
|
We showed how treating a Blocks app like a regular python helps you compose functionality across different apps.
Any Blocks app can be treated like a function, but a powerful pattern is to `load` an app hosted on
[Hugging Face Spaces](https://huggingface.co/spaces) prior to treating it like a function in your own app.
You can also load models hosted on the [Hugging Face Model Hub](https://huggingface.co/models) - see the [Using Hugging Face Integrations](/using_hugging_face_integrations) guide for an example.
Happy building! ⚒️
|
Parting Remarks
|
https://gradio.app/guides/using-blocks-like-functions
|
Building With Blocks - Using Blocks Like Functions Guide
|
In the example below, we will create a variable number of Textboxes. When the user edits the input Textbox, we create a Textbox for each letter in the input. Try it out below:
$code_render_split_simple
$demo_render_split_simple
See how we can now create a variable number of Textboxes using our custom logic - in this case, a simple `for` loop. The `@gr.render` decorator enables this with the following steps:
1. Create a function and attach the @gr.render decorator to it.
2. Add the input components to the `inputs=` argument of @gr.render, and create a corresponding argument in your function for each component. This function will automatically re-run on any change to a component.
3. Add all components inside the function that you want to render based on the inputs.
Now whenever the inputs change, the function re-runs, and replaces the components created from the previous function run with the latest run. Pretty straightforward! Let's add a little more complexity to this app:
$code_render_split
$demo_render_split
By default, `@gr.render` re-runs are triggered by the `.load` listener to the app and the `.change` listener to any input component provided. We can override this by explicitly setting the triggers in the decorator, as we have in this app to only trigger on `input_text.submit` instead.
If you are setting custom triggers, and you also want an automatic render at the start of the app, make sure to add `demo.load` to your list of triggers.
|
Dynamic Number of Components
|
https://gradio.app/guides/dynamic-apps-with-render-decorator
|
Building With Blocks - Dynamic Apps With Render Decorator Guide
|
If you're creating components, you probably want to attach event listeners to them as well. Let's take a look at an example that takes in a variable number of Textbox as input, and merges all the text into a single box.
$code_render_merge_simple
$demo_render_merge_simple
Let's take a look at what's happening here:
1. The state variable `text_count` is keeping track of the number of Textboxes to create. By clicking on the Add button, we increase `text_count` which triggers the render decorator.
2. Note that in every single Textbox we create in the render function, we explicitly set a `key=` argument. This key allows us to preserve the value of this Component between re-renders. If you type in a value in a textbox, and then click the Add button, all the Textboxes re-render, but their values aren't cleared because the `key=` maintains the the value of a Component across a render.
3. We've stored the Textboxes created in a list, and provide this list as input to the merge button event listener. Note that **all event listeners that use Components created inside a render function must also be defined inside that render function**. The event listener can still reference Components outside the render function, as we do here by referencing `merge_btn` and `output` which are both defined outside the render function.
Just as with Components, whenever a function re-renders, the event listeners created from the previous render are cleared and the new event listeners from the latest run are attached.
This allows us to create highly customizable and complex interactions!
|
Dynamic Event Listeners
|
https://gradio.app/guides/dynamic-apps-with-render-decorator
|
Building With Blocks - Dynamic Apps With Render Decorator Guide
|
The `key=` argument is used to let Gradio know that the same component is being generated when your render function re-runs. This does two things:
1. The same element in the browser is re-used from the previous render for this Component. This gives browser performance gains - as there's no need to destroy and rebuild a component on a render - and preserves any browser attributes that the Component may have had. If your Component is nested within layout items like `gr.Row`, make sure they are keyed as well because the keys of the parents must also match.
2. Properties that may be changed by the user or by other event listeners are preserved. By default, only the "value" of Component is preserved, but you can specify any list of properties to preserve using the `preserved_by_key=` kwarg.
See the example below:
$code_render_preserve_key
$demo_render_preserve_key
You'll see in this example, when you change the `number_of_boxes` slider, there's a new re-render to update the number of box rows. If you click the "Change Label" buttons, they change the `label` and `info` properties of the corresponding textbox. You can also enter text in any textbox to change its value. If you change number of boxes after this, the re-renders "reset" the `info`, but the `label` and any entered `value` is still preserved.
Note you can also key any event listener, e.g. `button.click(key=...)` if the same listener is being recreated with the same inputs and outputs across renders. This gives performance benefits, and also prevents errors from occuring if an event was triggered in a previous render, then a re-render occurs, and then the previous event finishes processing. By keying your listener, Gradio knows where to send the data properly.
|
Closer Look at `keys=` parameter
|
https://gradio.app/guides/dynamic-apps-with-render-decorator
|
Building With Blocks - Dynamic Apps With Render Decorator Guide
|
Let's look at two examples that use all the features above. First, try out the to-do list app below:
$code_todo_list
$demo_todo_list
Note that almost the entire app is inside a single `gr.render` that reacts to the tasks `gr.State` variable. This variable is a nested list, which presents some complexity. If you design a `gr.render` to react to a list or dict structure, ensure you do the following:
1. Any event listener that modifies a state variable in a manner that should trigger a re-render must set the state variable as an output. This lets Gradio know to check if the variable has changed behind the scenes.
2. In a `gr.render`, if a variable in a loop is used inside an event listener function, that variable should be "frozen" via setting it to itself as a default argument in the function header. See how we have `task=task` in both `mark_done` and `delete`. This freezes the variable to its "loop-time" value.
Let's take a look at one last example that uses everything we learned. Below is an audio mixer. Provide multiple audio tracks and mix them together.
$code_audio_mixer
$demo_audio_mixer
Two things to note in this app:
1. Here we provide `key=` to all the components! We need to do this so that if we add another track after setting the values for an existing track, our input values to the existing track do not get reset on re-render.
2. When there are lots of components of different types and arbitrary counts passed to an event listener, it is easier to use the set and dictionary notation for inputs rather than list notation. Above, we make one large set of all the input `gr.Audio` and `gr.Slider` components when we pass the inputs to the `merge` function. In the function body we query the component values as a dict.
The `gr.render` expands gradio capabilities extensively - see what you can make out of it!
|
Putting it Together
|
https://gradio.app/guides/dynamic-apps-with-render-decorator
|
Building With Blocks - Dynamic Apps With Render Decorator Guide
|
Take a look at the demo below.
$code_hello_blocks
$demo_hello_blocks
- First, note the `with gr.Blocks() as demo:` clause. The Blocks app code will be contained within this clause.
- Next come the Components. These are the same Components used in `Interface`. However, instead of being passed to some constructor, Components are automatically added to the Blocks as they are created within the `with` clause.
- Finally, the `click()` event listener. Event listeners define the data flow within the app. In the example above, the listener ties the two Textboxes together. The Textbox `name` acts as the input and Textbox `output` acts as the output to the `greet` method. This dataflow is triggered when the Button `greet_btn` is clicked. Like an Interface, an event listener can take multiple inputs or outputs.
You can also attach event listeners using decorators - skip the `fn` argument and assign `inputs` and `outputs` directly:
$code_hello_blocks_decorator
|
Blocks Structure
|
https://gradio.app/guides/blocks-and-event-listeners
|
Building With Blocks - Blocks And Event Listeners Guide
|
In the example above, you'll notice that you are able to edit Textbox `name`, but not Textbox `output`. This is because any Component that acts as an input to an event listener is made interactive. However, since Textbox `output` acts only as an output, Gradio determines that it should not be made interactive. You can override the default behavior and directly configure the interactivity of a Component with the boolean `interactive` keyword argument, e.g. `gr.Textbox(interactive=True)`.
```python
output = gr.Textbox(label="Output", interactive=True)
```
_Note_: What happens if a Gradio component is neither an input nor an output? If a component is constructed with a default value, then it is presumed to be displaying content and is rendered non-interactive. Otherwise, it is rendered interactive. Again, this behavior can be overridden by specifying a value for the `interactive` argument.
|
Event Listeners and Interactivity
|
https://gradio.app/guides/blocks-and-event-listeners
|
Building With Blocks - Blocks And Event Listeners Guide
|
Take a look at the demo below:
$code_blocks_hello
$demo_blocks_hello
Instead of being triggered by a click, the `welcome` function is triggered by typing in the Textbox `inp`. This is due to the `change()` event listener. Different Components support different event listeners. For example, the `Video` Component supports a `play()` event listener, triggered when a user presses play. See the [Docs](http://gradio.app/docscomponents) for the event listeners for each Component.
|
Types of Event Listeners
|
https://gradio.app/guides/blocks-and-event-listeners
|
Building With Blocks - Blocks And Event Listeners Guide
|
A Blocks app is not limited to a single data flow the way Interfaces are. Take a look at the demo below:
$code_reversible_flow
$demo_reversible_flow
Note that `num1` can act as input to `num2`, and also vice-versa! As your apps get more complex, you will have many data flows connecting various Components.
Here's an example of a "multi-step" demo, where the output of one model (a speech-to-text model) gets fed into the next model (a sentiment classifier).
$code_blocks_speech_text_sentiment
$demo_blocks_speech_text_sentiment
|
Multiple Data Flows
|
https://gradio.app/guides/blocks-and-event-listeners
|
Building With Blocks - Blocks And Event Listeners Guide
|
The event listeners you've seen so far have a single input component. If you'd like to have multiple input components pass data to the function, you have two options on how the function can accept input component values:
1. as a list of arguments, or
2. as a single dictionary of values, keyed by the component
Let's see an example of each:
$code_calculator_list_and_dict
Both `add()` and `sub()` take `a` and `b` as inputs. However, the syntax is different between these listeners.
1. To the `add_btn` listener, we pass the inputs as a list. The function `add()` takes each of these inputs as arguments. The value of `a` maps to the argument `num1`, and the value of `b` maps to the argument `num2`.
2. To the `sub_btn` listener, we pass the inputs as a set (note the curly brackets!). The function `sub()` takes a single dictionary argument `data`, where the keys are the input components, and the values are the values of those components.
It is a matter of preference which syntax you prefer! For functions with many input components, option 2 may be easier to manage.
$demo_calculator_list_and_dict
|
Function Input List vs Dict
|
https://gradio.app/guides/blocks-and-event-listeners
|
Building With Blocks - Blocks And Event Listeners Guide
|
Similarly, you may return values for multiple output components either as:
1. a list of values, or
2. a dictionary keyed by the component
Let's first see an example of (1), where we set the values of two output components by returning two values:
```python
with gr.Blocks() as demo:
food_box = gr.Number(value=10, label="Food Count")
status_box = gr.Textbox()
def eat(food):
if food > 0:
return food - 1, "full"
else:
return 0, "hungry"
gr.Button("Eat").click(
fn=eat,
inputs=food_box,
outputs=[food_box, status_box]
)
```
Above, each return statement returns two values corresponding to `food_box` and `status_box`, respectively.
**Note:** if your event listener has a single output component, you should **not** return it as a single-item list. This will not work, since Gradio does not know whether to interpret that outer list as part of your return value. You should instead just return that value directly.
Now, let's see option (2). Instead of returning a list of values corresponding to each output component in order, you can also return a dictionary, with the key corresponding to the output component and the value as the new value. This also allows you to skip updating some output components.
```python
with gr.Blocks() as demo:
food_box = gr.Number(value=10, label="Food Count")
status_box = gr.Textbox()
def eat(food):
if food > 0:
return {food_box: food - 1, status_box: "full"}
else:
return {status_box: "hungry"}
gr.Button("Eat").click(
fn=eat,
inputs=food_box,
outputs=[food_box, status_box]
)
```
Notice how when there is no food, we only update the `status_box` element. We skipped updating the `food_box` component.
Dictionary returns are helpful when an event listener affects many components on return, or conditionally affects outputs and not others.
Keep in mind that with dictionary returns,
|
Function Return List vs Dict
|
https://gradio.app/guides/blocks-and-event-listeners
|
Building With Blocks - Blocks And Event Listeners Guide
|
d_box` component.
Dictionary returns are helpful when an event listener affects many components on return, or conditionally affects outputs and not others.
Keep in mind that with dictionary returns, we still need to specify the possible outputs in the event listener.
|
Function Return List vs Dict
|
https://gradio.app/guides/blocks-and-event-listeners
|
Building With Blocks - Blocks And Event Listeners Guide
|
The return value of an event listener function is usually the updated value of the corresponding output Component. Sometimes we want to update the configuration of the Component as well, such as the visibility. In this case, we return a new Component, setting the properties we want to change.
$code_blocks_essay_simple
$demo_blocks_essay_simple
See how we can configure the Textbox itself through a new `gr.Textbox()` method. The `value=` argument can still be used to update the value along with Component configuration. Any arguments we do not set will preserve their previous values.
|
Updating Component Configurations
|
https://gradio.app/guides/blocks-and-event-listeners
|
Building With Blocks - Blocks And Event Listeners Guide
|
In some cases, you may want to leave a component's value unchanged. Gradio includes a special function, `gr.skip()`, which can be returned from your function. Returning this function will keep the output component (or components') values as is. Let us illustrate with an example:
$code_skip
$demo_skip
Note the difference between returning `None` (which generally resets a component's value to an empty state) versus returning `gr.skip()`, which leaves the component value unchanged.
Tip: if you have multiple output components, and you want to leave all of their values unchanged, you can just return a single `gr.skip()` instead of returning a tuple of skips, one for each element.
|
Not Changing a Component's Value
|
https://gradio.app/guides/blocks-and-event-listeners
|
Building With Blocks - Blocks And Event Listeners Guide
|
You can also run events consecutively by using the `then` method of an event listener. This will run an event after the previous event has finished running. This is useful for running events that update components in multiple steps.
For example, in the chatbot example below, we first update the chatbot with the user message immediately, and then update the chatbot with the computer response after a simulated delay.
$code_chatbot_consecutive
$demo_chatbot_consecutive
The `.then()` method of an event listener executes the subsequent event regardless of whether the previous event raised any errors. If you'd like to only run subsequent events if the previous event executed successfully, use the `.success()` method, which takes the same arguments as `.then()`. Conversely, if you'd like to only run subsequent events if the previous event failed (i.e., raised an error), use the `.failure()` method. This is particularly useful for error handling workflows, such as displaying error messages or restoring previous states when an operation fails.
|
Running Events Consecutively
|
https://gradio.app/guides/blocks-and-event-listeners
|
Building With Blocks - Blocks And Event Listeners Guide
|
Often times, you may want to bind multiple triggers to the same function. For example, you may want to allow a user to click a submit button, or press enter to submit a form. You can do this using the `gr.on` method and passing a list of triggers to the `trigger`.
$code_on_listener_basic
$demo_on_listener_basic
You can use decorator syntax as well:
$code_on_listener_decorator
You can use `gr.on` to create "live" events by binding to the `change` event of components that implement it. If you do not specify any triggers, the function will automatically bind to all `change` event of all input components that include a `change` event (for example `gr.Textbox` has a `change` event whereas `gr.Button` does not).
$code_on_listener_live
$demo_on_listener_live
You can follow `gr.on` with `.then`, just like any regular event listener. This handy method should save you from having to write a lot of repetitive code!
|
Binding Multiple Triggers to a Function
|
https://gradio.app/guides/blocks-and-event-listeners
|
Building With Blocks - Blocks And Event Listeners Guide
|
If you want to set a Component's value to always be a function of the value of other Components, you can use the following shorthand:
```python
with gr.Blocks() as demo:
num1 = gr.Number()
num2 = gr.Number()
product = gr.Number(lambda a, b: a * b, inputs=[num1, num2])
```
This functionally the same as:
```python
with gr.Blocks() as demo:
num1 = gr.Number()
num2 = gr.Number()
product = gr.Number()
gr.on(
[num1.change, num2.change, demo.load],
lambda a, b: a * b,
inputs=[num1, num2],
outputs=product
)
```
|
Binding a Component Value Directly to a Function of Other Components
|
https://gradio.app/guides/blocks-and-event-listeners
|
Building With Blocks - Blocks And Event Listeners Guide
|
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.