How to create two columns drag and drop app by using streamlit_dnd

Welcome to the Streamlit community! Thanks for sharing your code and error details—you’re definitely on the right track with streamlit-dnd for drag-and-drop between columns. The error you’re seeing, IndexError: pop index out of range , usually means the drag-and-drop event is trying to move an item from a list index that doesn’t exist, often due to a mismatch between the UI and the underlying data structure.