Streamlit Plotly_chart Kwargs Deprecation Warning Fix
Unraveling the st.plotly_chart kwargs Deprecation Warning
Have you recently encountered a rather puzzling deprecation warning when using st.plotly_chart in your Streamlit applications, especially when trying to set the width or height with values like "content"? You're not alone! This specific kwargs deprecation warning has been cropping up for many developers, leaving them scratching their heads because they often aren't explicitly passing any variable keyword arguments. It feels a bit like being told off for something you didn't do, doesn't it? This article aims to demystify this warning, explain its root cause, and, most importantly, provide clear, actionable steps to resolve it, ensuring your Streamlit apps continue to run smoothly and warning-free. We’ll delve into why this warning appears even with seemingly innocent parameters and how you can adapt your code to align with Streamlit’s evolving best practices for plotly_chart.
The world of software development is constantly evolving, and with it, our favorite libraries like Streamlit and Plotly. Deprecations, while sometimes a little inconvenient, are a vital part of this evolution. They signal that a particular way of doing things is being phased out in favor of a newer, often more robust, efficient, or clearer method. In this case, the deprecation is tied to how st.plotly_chart handles additional parameters. Understanding why a feature is deprecated is often as important as knowing how to fix it. It helps us write better, more future-proof code and prevents similar issues down the line. We’ll explore the intent behind this change, moving away from relying on generic kwargs for specific configuration options, and moving towards a more structured approach. This shift helps maintain consistency and predictability, which are crucial for any growing framework. So, let’s get ready to tackle this warning head-on and make our Streamlit apps shine even brighter.
This particular kwargs deprecation warning can be quite frustrating because it often appears when you're using what seem like perfectly valid and documented parameters, such as width="content". Many developers expect that if a parameter is in the documentation, it should work without raising a warning. However, the internal logic of st.plotly_chart interprets certain parameters, especially those not directly mapped to plotly.graph_objects.Figure layout attributes, as part of a catch-all **kwargs argument. This triggers the deprecation notice, even if the parameter itself isn’t being removed, but rather the mechanism by which it was implicitly handled. The goal is to move towards a more explicit way of handling Plotly chart configurations, particularly those that control the rendering behavior within Streamlit. This ensures that the framework can differentiate between Streamlit-specific rendering options and Plotly-specific plot configurations, leading to cleaner code and fewer ambiguities in the future. By the end of this article, you'll have a solid grasp of how to manage your st.plotly_chart calls effectively and without unwanted warnings.
Diving Deeper: The st.plotly_chart kwargs Deprecation Explained
What Exactly is Happening? Decoding the kwargs Warning
The core of the st.plotly_chart kwargs deprecation warning lies in how Streamlit processes arguments passed to the st.plotly_chart function. Traditionally, Streamlit's st.plotly_chart function was quite flexible, allowing developers to pass a wide array of arguments, including specific width and height settings like width="content" or use_container_width=True. While use_container_width=True was explicitly deprecated and replaced by use_container_width as a direct parameter (which can be a boolean), the `width=
