Streamlit App Structure & Basics - AccentFuture

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Streamlit App Structure Basics

• Quick Guide to Building Interactive Web Apps

www.accentfuture.com
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What is Streamlit?

• Open-source Python library
• Quickly create interactive web apps for data
  science and machine learning
• Focused on simplicity and rapid development

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Key Features of Streamlit

• Easy to use pure Python
• No front-end experience required
• Widgets for interactivity (buttons, sliders,
  inputs)
• Hot-reloading on save
• Deploy easily to the cloud

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Basic Streamlit App Structure
-python import streamlit as st st.title("My
First Streamlit App") st.write("Hello,
Streamlit!")

• Always start by importing Streamlit
• Use Streamlit functions to create UI elements

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Common Streamlit Elements

• st.title()
• st.header()
• st.subheader()
• st.text() / st.markdown()
• st.write()
• st.dataframe()
• st.metric()

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Adding Interactivity

• Widgets examples
• st.button("Click Me")
• st.slider("Select a number", 0, 100)
• st.text_input("Enter your name")
• Widgets return values you can use

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Streamlit Layout Options

• Containers st.container()
• Columns st.columns()
• Expanders st.expander()
• Sidebar st.sidebar

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Example - Simple Interactive App
-python name st.text_input("What's your
name?") if st.button("Greet")
st.write(f"Hello, name!")
- Live feedback from user inputs
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How Streamlit Runs

• Script is re-run from top to bottom on any
  interaction
• State is handled internally
• Use st.session_state for complex apps

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Best Practices

• Keep code simple and modular
• Use functions to organize code
• Minimize use of global variables
• Use caching with _at_st.cache_data or
  _at_st.cache_resource

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Deploying Streamlit Apps

• Streamlit Community Cloud
• AWS, GCP, Azure (via containers or VMs)
• Share apps easily with a public link

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Summary

• Streamlit Easy, Fast, Powerful
• Great for prototyping and sharing ML/data science
  projects
• Practice by building mini projects!

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Contact Details

• ?? Enroll Now www.accentfuture.com?? Email
  contact_at_accentfuture.com?? Call 91-9640001789
• Streamlit Training