3 8 Buttons Explained

Key Concepts

• st.button: A widget that creates a clickable button.
• Parameters: Understanding the parameters like label and key.
• Interactive Use: How to use buttons to trigger actions in your Streamlit app.

st.button

st.button is a Streamlit widget that creates a clickable button. When the button is clicked, it returns True; otherwise, it returns False. This widget is essential for creating interactive applications where user actions trigger specific events or computations.

Parameters

The st.button function accepts several parameters to customize its behavior:

• label: A string that provides a label for the button.
• key: A unique key that identifies the button, useful when multiple buttons are present.

Interactive Use

Using st.button, you can create interactive applications where users can trigger actions by clicking a button. For example, you can create a button that performs a calculation, updates a plot, or displays a message.

Examples

Here are some examples to illustrate the use of st.button:

import streamlit as st

st.title("Button Example")

# Basic button
if st.button("Click me"):
    st.write("Button was clicked!")

# Button with a unique key
if st.button("Click me again", key="unique_key"):
    st.write("Another button was clicked!")

# Interactive button to trigger a calculation
number = st.number_input("Enter a number", min_value=0, max_value=100, step=1)
if st.button("Calculate Square"):
    result = number ** 2
    st.write(f"The square of {number} is {result}")
    

In the first example, a basic button is created. When clicked, it displays a message. The second example demonstrates using a unique key for a button. The third example shows how to create an interactive button that triggers a calculation based on user input.