Streamlit
1 Introduction to Streamlit
1.1 What is Streamlit?
1.2 Why use Streamlit?
1.3 Setting up the environment
1.4 Creating your first Streamlit app
2 Basic Components
2.1 Text elements
2.1 1 Displaying text
2.1 2 Formatting text
2.2 Data display elements
2.2 1 Displaying data frames
2.2 2 Displaying tables
2.3 Input widgets
2.3 1 Text input
2.3 2 Number input
2.3 3 Date input
2.3 4 Dropdown selection
2.3 5 Slider
2.3 6 Checkbox
2.3 7 Radio buttons
2.3 8 Buttons
3 Advanced Components
3.1 Interactive widgets
3.1 1 Multiselect
3.1 2 File uploader
3.1 3 Color picker
3.2 Media elements
3.2 1 Displaying images
3.2 2 Displaying videos
3.2 3 Displaying audio
3.3 Chart elements
3.3 1 Line chart
3.3 2 Bar chart
3.3 3 Area chart
3.3 4 Scatter chart
3.3 5 Map chart
4 Layout and Styling
4.1 Layout components
4.1 1 Columns
4.1 2 Tabs
4.1 3 Expander
4.2 Styling elements
4.2 1 Custom CSS
4.2 2 Theming
4.2 3 Adding custom fonts
5 State Management
5.1 Session state
5.1 1 Managing state across reruns
5.1 2 Persisting state
5.2 Caching
5.2 1 Caching functions
5.2 2 Caching data
6 Deployment
6.1 Deploying to Streamlit Sharing
6.1 1 Setting up Streamlit Sharing
6.1 2 Deploying your app
6.2 Deploying to other platforms
6.2 1 Deploying to Heroku
6.2 2 Deploying to AWS
6.2 3 Deploying to Google Cloud
7 Best Practices
7.1 Writing clean and maintainable code
7.2 Optimizing performance
7.3 Handling errors and exceptions
7.4 Version control with Git
8 Advanced Topics
8.1 Integrating with other libraries
8.1 1 Integrating with Pandas
8.1 2 Integrating with Plotly
8.1 3 Integrating with TensorFlow
8.2 Building complex apps
8.2 1 Creating multi-page apps
8.2 2 Handling authentication
8.2 3 Building interactive dashboards
8.3 Custom components
8.3 1 Creating custom widgets
8.3 2 Extending Streamlit with custom components
9 Case Studies
9.1 Building a data exploration app
9.2 Building a machine learning model deployment app
9.3 Building a real-time data visualization app
Why Use Streamlit?

Why Use Streamlit?

Streamlit is a powerful tool for creating web applications with Python. It allows developers to quickly build and deploy data-driven applications without the need for extensive web development experience. Here are some key reasons why you should consider using Streamlit:

1. Rapid Prototyping

Streamlit enables rapid prototyping by allowing developers to write Python scripts and instantly see the results in a web browser. This eliminates the need for complex front-end development, making it easier to iterate and refine your application quickly.

2. Simplified Data Visualization

Streamlit integrates seamlessly with popular Python libraries like Matplotlib, Plotly, and Altair, allowing you to create interactive and dynamic visualizations with minimal code. This makes it an ideal tool for data scientists and analysts who want to showcase their findings in an engaging way.

3. Easy Deployment

Deploying a Streamlit application is straightforward. You can host your app on platforms like Heroku, AWS, or Streamlit's own hosting service. The simplicity of deployment means you can focus on building your application rather than worrying about infrastructure.

4. Interactive Widgets

Streamlit provides a variety of interactive widgets such as sliders, buttons, and text inputs, allowing users to interact with your application in real-time. This interactivity enhances the user experience and makes your application more engaging.

5. Community and Ecosystem

Streamlit has a growing community and ecosystem, with numerous tutorials, plugins, and extensions available. This community support makes it easier to find solutions to common problems and to integrate Streamlit with other tools and frameworks.

Example: Creating a Simple Streamlit App

Here's a simple example of how you can create a Streamlit app that displays a line chart:

import streamlit as st
import numpy as np
import matplotlib.pyplot as plt

st.title('Simple Line Chart')

# Generate some random data
data = np.random.randn(100)

# Create a line chart
fig, ax = plt.subplots()
ax.plot(data)

# Display the chart in the Streamlit app
st.pyplot(fig)
    

In this example, we import Streamlit and Matplotlib, generate some random data, and then create and display a line chart. The simplicity of the code highlights how Streamlit allows you to focus on the logic of your application rather than the complexities of web development.

By leveraging Streamlit's features, you can create powerful, interactive web applications with minimal effort, making it an invaluable tool for data scientists, developers, and anyone looking to build data-driven applications quickly and efficiently.