Beginner's Guide to Streamlit with Python: Build Web-Based Data and Machine Learning Applications

Table of Contents....5 About the Author....12 About the Technical Reviewer....13 Acknowledgments....14 Introduction....15 Chapter 1: Introduction to Streamlit....18 What Is Streamlit?....18 Why Streamlit?....19 Why Streamlit for Data Science and ML Engineers?....19 Features of Streamlit....20 Open Source....20 Platforms....20 Ease of Development....20 Interactive Applications....20 Reduced Time of Development....20 No Core Web Development Knowledge....21 Easy to Learn....21 Model Implementation....21 Compatibility....21 Literate Programming Document....22 Streamlit Cloud....22 Optimize Change....22 Error Notifications....23 Comparing Streamlit to Alternative Frameworks....23 Installing Python....25 Installing Streamlit on Windows....26 Installing Streamlit on Linux....26 Installing Streamlit on macOS....26 Testing the Streamlit Installation....27 Creating Our First App....29 Summary....32 Chapter 2: Text and Table Elements....33 Text Elements....33 Titles....34 Headers....35 Subheaders....36 Captions....37 Plain Text....39 Markdown....40 LaTeX....41 Code....42 Data Elements....45 Dataframes....45 Tables....48 Metrics....50 JSON....52 The write() Function as a Superfunction....54 Magic....58 Summary....61 Chapter 3: Visualization....62 The Importance of Visualization....62 Visualization in Streamlit....62 Purpose of Visualization....63 Streamlit Functions....63 Bar....63 Line....65 Area....66 Map....68 Graphviz....69 Seaborn....71 Count....72 Violin....73 Strip....74 Altair....75 Boxplot....76 Area....77 Heatmap....78 Plotly....80 Pie....80 Donut....82 Scatter....83 Line....85 Bar....86 Bar Horizontal....89 Subplots....90 Summary....92 Chapter 4: Data and Media Elements....94 Images....94 Multiple Images....99 Background Image....102 Resizing an Image....103 Audio....105 Video....107 Balloon....110 Snowflake....111 Emojis....112 Summary....113 Chapter 5: Buttons and Sliders....114 Buttons....114 Radio Buttons....115 Check Boxes....117 Drop-Downs....119 Multiselects....121 Download Buttons....123 Progress Bars....124 Spinners....126 Summary....127 Chapter 6: Forms....128 Text Box....128 Text Area....132 Number Input....133 Time....135 Date....136 Color....138 File Upload....140 Text/Docx Document....141 PDF Upload....146 Dataset Upload....148 Image Upload....150 Uploading Multiple Images....151 Saving Uploaded Documents....153 Submit Button....157 Summary....158 Chapter 7: Columns and Navigation....159 Columns....159 Spaced-Out Columns....160 Columns with Padding....162 Grids....164 Expanders/Accordions....165 Containers....167 Empty Containers....169 Sidebars....170 Multipage Navigation....171 Main Page....172 Pages....172 Summary....174 Chapter 8: Control Flow and Advanced Features....175 Alert Box....175 st.info()....175 st.warning()....176 st.success()....176 st.error()....176 st.exception()....176 Control Flow....177 Stop Execution....178 Rerun the Script....178 st.form_submit_button....179 Advanced Features....180 Configuring the Page....180 st.echo....181 st.experimental_show....182 Session State....183 Performance....185 Caching....185 st.experimental_memo....186 st.experimental_memo.clear()....187 st.experimental_singleton....187 st.experimental_singleton.clear....187 Summary....188 Chapter 9: Natural Language Processing....189 NLP App Creation....189 User Input....190 Cleaning the Text....190 Predictions....191 Setting Up Files....194 Requirement Text....195 setup.sh....195 Procfile....196 GitHub Repository Creation....197 Heroku....197 Deployment....199 Summary....201 Chapter 10: Computer Vision in Streamlit....202 Installing Libraries....202 Model Deployment....203 Upload Image....203 Map Image Classes....204 Apply Imaging Techniques....204 Model Preprocessing....205 Predictions....205 Complete Code....206 Index....209