# Warning

```python
gradio.Warning("A warning occured ⛔️!", duration=5)
```

### Description

This function allows you to pass custom warning messages to the user. You can do so simply by writing `gr.Warning('message here')` in your function, and when that line is executed the custom message will appear in a modal on the demo. The modal is yellow by default and has the heading: "Warning." Queue must be enabled for this behavior; otherwise, the warning will be printed to the console using the `warnings` library.

### Example Usage

```python
import gradio as gr
def hello_world():
    gr.Warning('This is a warning message.')
    return "hello world"
with gr.Blocks() as demo:
    md = gr.Markdown()
    demo.load(hello_world, inputs=None, outputs=[md])
demo.queue().launch()
```

### Initialization

| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `message` | `str` | `"Warning issued."` | The warning message to be displayed to the user. Can be HTML, which will be rendered in the modal. |
| `duration` | `float \| None` | `10` | The duration in seconds that the warning message should be displayed for. If None or 0, the message will be displayed indefinitely until the user closes it. |
| `visible` | `bool` | `True` | Whether the error message should be displayed in the UI. |
| `title` | `str` | `"Warning"` | The title to be displayed to the user at the top of the modal. |
### Demos

**blocks_chained_events**

[See demo on Hugging Face Spaces](https://huggingface.co/spaces/gradio/blocks_chained_events)

```python
import gradio as gr

def failure():
    raise gr.Error("This should fail!")

def exception():
    raise ValueError("Something went wrong")

def success():
    return True

def warning_fn():
    gr.Warning("This is a warning!")

def info_fn():
    gr.Info("This is some info")

with gr.Blocks() as demo:
    gr.Markdown("Used in E2E tests of success event trigger. The then event covered in chatbot E2E tests."
                " Also testing that the status modals show up.")
    with gr.Row():
        result = gr.Textbox(label="Result")
        result_2 = gr.Textbox(label="Consecutive Event")
        result_failure = gr.Textbox(label="Failure Event")
    with gr.Row():
        success_btn = gr.Button(value="Trigger Success")
        success_btn_2 = gr.Button(value="Trigger Consecutive Success")
        failure_btn = gr.Button(value="Trigger Failure")
        failure_exception = gr.Button(value="Trigger Failure With ValueError")
    with gr.Row():
        trigger_warning = gr.Button(value="Trigger Warning")
        trigger_info = gr.Button(value="Trigger Info")

        success_btn_2.click(success, None, None).success(lambda: "First Event Trigered", None, result).success(lambda: "Consecutive Event Triggered", None, result_2)
        success_event = success_btn.click(success, None, None)
        success_event.success(lambda: "Success event triggered", inputs=None, outputs=result)
        success_event.failure(lambda: "Should not be triggered", inputs=None, outputs=result_failure)
        failure_event = failure_btn.click(failure, None, None)
        failure_event.success(lambda: "Should not be triggered", inputs=None, outputs=result)
        failure_event.failure(lambda: "Failure event triggered", inputs=None, outputs=result_failure)
        failure_exception.click(exception, None, None)
        trigger_warning.click(warning_fn, None, None)
        trigger_info.click(info_fn, None, None)

if __name__ == "__main__":
    demo.launch(show_error=True)
```

- [Alerts](https://www.gradio.app/guides/alerts)