Streamlit Plotly_chart Width Warning: A Quick Fix Guide

Are you a Streamlit developer constantly striving to create beautiful, interactive data applications? If so, you've likely encountered the incredibly versatile st.plotly_chart function. It's fantastic for embedding dynamic Plotly visualizations directly into your apps. However, recently, many developers have been scratching their heads over a pesky deprecation warning that pops up when using seemingly innocent parameters like width="content" or height="content". This can be quite frustrating, as you're following the documentation, yet the console keeps nagging you about kwargs being deprecated. Don't worry, you're not alone, and we're here to help you navigate this unexpected behavior. This article will dive deep into understanding why this warning appears, what impact it has, and most importantly, what practical solutions and workarounds you can employ right now to keep your Streamlit apps running smoothly and warning-free. We'll explore the technical details behind the plotly_chart kwargs deprecation warning and provide clear steps to mitigate it, ensuring your development experience remains as pleasant as possible. We understand that a clean console is a happy console, and misleading warnings can interrupt your flow. Let's get to the bottom of this together and ensure your Streamlit journey continues to be seamless, allowing you to focus on building amazing data tools without unnecessary distractions. Our goal is to empower you with the knowledge to troubleshoot this specific issue and confidently move forward, leveraging the full power of Streamlit and Plotly for your interactive dashboards and reports. The good news is that while the warning is annoying, it typically doesn't break your application's functionality, but addressing it improves code clarity and maintainability. Stick with us as we uncover the nuances of this issue and equip you with the best strategies.

Understanding the plotly_chart Deprecation Warning

What's Happening Behind the Scenes?

So, why are you seeing this plotly_chart kwargs deprecation warning, even when you're diligently using documented parameters like width="content" in st.plotly_chart? The core of the issue lies in a recent internal change within Streamlit, specifically around how the st.plotly_chart function handles keyword arguments. The Streamlit team has been working to refine the API for st.plotly_chart, aiming to make it cleaner and more explicit. Part of this effort involved deprecating the use of arbitrary, variable keyword arguments (**kwargs) that could be passed directly to st.plotly_chart. The intention was to encourage users to specify Plotly configuration options through a dedicated config argument, rather than passing them loosely as kwargs. This is a sensible move for long-term API stability and clarity. However, the current implementation, as observed in Streamlit version 1.50.0 (and potentially others), mistakenly identifies certain documented parameters, such as width and height when set to `