Data Apps with Streamlit

State & Caching

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Explore the idea

Why Plain Variables Don't Survive Reruns

Opening your lesson…

Opening your space…

IN THIS LESSON

YOU’RE LEARNING TO

↗learner can explain why top-level variables reset on every rerun

↗learner can persist values across reruns using st.session_state

↗learner can apply @st.cache_data to cache data-loading functions

↗learner can distinguish @st.cache_data from @st.cache_resource

↗learner can batch multiple inputs with st.form to avoid excessive reruns