If you’re building a data app using Streamlit inside a Jupyter Notebook environment and run into mysterious errors or warnings—you’re not alone. Here’s a quick guide on two common issues and how to fix them. Error: Streamlit requires raw Python (.py) files, not .ipynb. Fix: Convert .ipynb to .py. by running the following in your terminal to convert your notebook to a proper Python script: This will create a file like: Once the .py script is ready and you launch it with: Streamlit will start serving your app and provide…