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Back 🌈🧠Streamlit functions—building interactive data apps 🚀🧩 24 Jul, 2025
Design and Layouts Design and Layouts Programming Programming
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🔥 Streamlit Cheat Sheet – All You Need to Know! 🔥

🖥️ 1. Display Elements – Present Your Content

Function Purpose
st.title("🚀 My App") Big bold title
st.header("📌 Section Header") Medium header
st.subheader("🔖 Sub Section") Small header
st.text("Just plain text") Simple text
st.markdown("**Bold** _Italic_") Supports rich formatting
st.code("print('Hello')") Show code block
st.latex(r"\alpha^2 + \beta^2 = \gamma^2") LaTeX equations
st.write(obj) Smart auto-display: text, chart, dataframe, etc.

🧠 2. User Input Widgets – Make Your App Interactive 🧩

Widget Type Function
🔘 Button st.button("Click me!")
☑️ Checkbox st.checkbox("I agree")
🔄 Radio st.radio("Choose:", ["A", "B", "C"])
⬇️ Selectbox st.selectbox("Pick one", ["X", "Y"])
🧾 Multiselect st.multiselect("Choose options", [...])
🎚 Slider st.slider("Select a range", 0, 100)
🧮 Number st.number_input("Enter number", min_value=0)
🗒 Text input st.text_input("Enter name")
📝 Text area st.text_area("Feedback")
📅 Date st.date_input("Pick a date")
⏰ Time st.time_input("Pick time")
📁 File upload st.file_uploader("Upload a file")
🎨 Color st.color_picker("Pick a color")

🎥 3. Media Display – Add Life to Your App 🌠

Type Function
🖼️ Image st.image("image.png")
🔊 Audio st.audio("audio.mp3")
🎥 Video st.video("video.mp4")

📊 4. Data & Chart Display – Data Made Beautiful 📈

Data Chart
📋 DataFrame st.dataframe(df) (scrollable + interactive)
📑 Table st.table(df) (static)
🧾 JSON st.json(data)
🧮 Metric st.metric("Revenue", "$10K", "+5%")

📈 Built-in Chart Types:

Chart Function
📉 Line st.line_chart(df)
📊 Bar st.bar_chart(df)
🌄 Area st.area_chart(df)

📊 External Libraries:

Library Function
🎨 Matplotlib st.pyplot(fig)
🧬 Altair st.altair_chart(chart)
🧠 Plotly st.plotly_chart(fig)
🎯 Bokeh st.bokeh_chart(fig)
🔗 Graphviz st.graphviz_chart(graph)
🌍 Maps st.map(df)

🧩 5. Layout Functions – Design Like a Pro 🎨

Layout Function
📍 Sidebar st.sidebar.xyz() → add any widget in sidebar
📦 Container with st.container():
🪟 Expander with st.expander("See more"):
🧱 Columns col1, col2 = st.columns(2)
🗂 Tabs tab1, tab2 = st.tabs(["A", "B"])
🪄 Empty placeholder = st.empty() → for dynamic content
⏳ Spinner with st.spinner("Loading..."):
🍞 Toast st.toast("Success!", icon="✅")

⚙️ 6. Control Flow & Caching – Add Logic 🔄

Feature Function
✅ Stop execution st.stop()
🔁 Rerun app st.experimental_rerun()
📦 Cache data @st.cache_data
🧠 Cache model/resource @st.cache_resource
🧰 Session state st.session_state["key"] = value

📂 7. File Handling – Upload & Download Files 📤📥

Task Function
Upload st.file_uploader("Upload your doc")
Download st.download_button("Download", data)

🎨 8. Customize Look & Feel – Make It Yours ✨

Task Function
Set page config st.set_page_config(page_title="My App", layout="wide", page_icon="🌟")
Add config file ~/.streamlit/config.toml (for global settings)

✅ Pro Tip: Use st.write() as your all-in-one function — it can render text, Markdown, charts, maps, DataFrames, and more!