Fix Plotly Chart Width/Height Deprecation Warning

It can be frustrating when you're working on your Streamlit application, trying to get your visualizations just right, and suddenly you're hit with a deprecation warning. This is exactly what's been happening for some users when using st.plotly_chart with specific width and height arguments, like width='content'. Even when you're not explicitly passing any variable keyword arguments (kwargs), and are only using documented parameters, this warning can pop up, leading to confusion. Let's dive into what's going on and how to handle it.

Understanding the st.plotly_chart Deprecation Warning

The core of the issue lies in how Streamlit handles arguments passed to st.plotly_chart. When you use a parameter like width='content' or height='content', Streamlit's internal mechanisms might be triggering a deprecation warning related to variable keyword arguments (kwargs). The warning message you might see is: "Variable keyword arguments for st.plotly_chart have been deprecated and will be removed in a future release. Use the config argument instead to specify Plotly configuration options." This warning is intended to guide users towards a more robust way of passing Plotly-specific configurations, primarily through the config argument, which offers better control and is less prone to unexpected behavior. However, in this specific scenario, the warning appears even when the user is not intentionally using variable keyword arguments, but rather documented parameters for controlling the chart's dimensions. This suggests a potential misinterpretation or an unintended consequence within Streamlit's argument parsing logic when these specific dimension arguments are used. It's a bit like telling someone not to use a specific tool for a job when they're actually using the designated tool correctly, but the system flags it anyway. The goal of Streamlit's developers is to streamline the API and ensure that customizations are done in a predictable and maintainable way. By encouraging the use of the config argument for Plotly settings, they aim to create a clearer separation between Streamlit's layout controls and Plotly's internal plotting configurations. This distinction is important because Plotly charts themselves have a vast array of configuration options, and passing them directly as kwargs to Streamlit could lead to conflicts or misunderstandings about what controls what. The config argument provides a dedicated dictionary where you can safely pass these Plotly-specific settings, ensuring that Streamlit's own layout parameters are not inadvertently affected or misinterpreted. For instance, if you wanted to set Plotly's scrollZoom property, you would do so within the config dictionary, rather than as a top-level argument to st.plotly_chart. The deprecation warning, in this context, is a nudge towards this more organized approach. However, its appearance when using standard width/height arguments indicates that the internal logic for detecting