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To install Gradio from main, run the following command:

pip install https://gradio-builds.s3.amazonaws.com/98c1cbcd0e3b66a8d2463820d3ce157efe0a032d/gradio-4.31.4-py3-none-any.whl

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

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Error 

gradio.Error(···)

Description

This class allows you to pass custom error messages to the user. You can do so by raising a gr.Error("custom message") anywhere in the code, and when that line is executed the custom message will appear in a modal on the demo.

Example Usage 

import gradio as gr
def divide(numerator, denominator):
    if denominator == 0:
        raise gr.Error("Cannot divide by zero!")
gr.Interface(divide, ["number", "number"], "number").launch()

Initialization

Parameter Description
message

<class 'str'>

default: "Error raised."

The error message to be displayed to the user.

Demos

app.py
import gradio as gr
#from foo import BAR
#
def calculator(num1, operation, num2):
if operation == "add":
return num1 + num2
elif operation == "subtract":
return num1 - num2
elif operation == "multiply":
return num1 * num2
elif operation == "divide":
if num2 == 0:
raise gr.Error("Cannot divide by zero!")
return num1 / num2

demo = gr.Interface(
calculator,
[
"number",
gr.Radio(["add", "subtract", "multiply", "divide"]),
"number"
],
"number",
examples=[
[45, "add", 3],
[3.14, "divide", 2],
[144, "multiply", 2.5],
[0, "subtract", 1.2],
],
title="Toy Calculator",
description="Here's a sample toy calculator. Allows you to calculate things like $2+2=4$",
)

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