How to Install Streamlit in Python Step by Step

Streamlit is a powerful Python library for building web apps. It simplifies data visualization and app creation. This guide will help you install Streamlit easily.

Prerequisites for Installing Streamlit

Before installing Streamlit, ensure you have Python installed. Python 3.6 or higher is recommended. Check your Python version using the command below.

 
# Check Python version
python --version

# Output example
Python 3.9.7

If you don't have Python, download it from the official website. Also, ensure pip is installed. Pip is Python's package manager.

Install Streamlit Using Pip

The easiest way to install Streamlit is using pip. Open your terminal or command prompt and run the following command.

 
# Install Streamlit
pip install streamlit

# Output example
Successfully installed streamlit-1.12.0

This will download and install Streamlit and its dependencies. If you encounter a ModuleNotFoundError, check our guide on how to solve ModuleNotFoundError.

Verify Streamlit Installation

After installation, verify it works. Run the following command to start a demo app.

 
# Run Streamlit demo
streamlit hello

# Output example
Welcome to Streamlit. Check out our demo in your browser.

This will open a browser window with a demo app. If it works, Streamlit is installed correctly.

Create Your First Streamlit App

Now, let's create a simple app. Create a new Python file named app.py and add the code below.

 
# app.py
import streamlit as st

st.title("My First Streamlit App")
st.write("Hello, Streamlit!")

Save the file and run it using the command below.

 
# Run the app
streamlit run app.py

# Output example
You can now view your Streamlit app in your browser.

This will launch your app in the browser. You should see a simple page with your title and message.

Common Installation Issues

Sometimes, issues may arise during installation. Here are a few common ones and their fixes.

1. Permission Errors: Use pip install --user streamlit to install locally.

2. Outdated Pip: Update pip using pip install --upgrade pip.

3. Virtual Environments: Use a virtual environment to avoid conflicts.

Conclusion

Installing Streamlit is simple with pip. Follow these steps to get started quickly. Now you can build interactive web apps with Python.