The keyword typically refers to two distinct user needs within the Plotly Dash framework : downloading a visual plot (as a PNG, JPEG, or PDF) or exporting the underlying data behind a graph (as a CSV or Excel file).
Are you looking to download the of the chart or the raw data used to create it? Download | Dash for Python Documentation | Plotly dash download graph
Helper function specifically for Pandas users to export CSV/Excel. Used if the file already exists on your server's disk. The keyword typically refers to two distinct user
Sometimes you want to give users a standalone version of the chart that remains interactive (zoomable/pannable) outside of your Dash app. This is done by writing the figure to a buffer and sending it through dcc.Download . Used if the file already exists on your server's disk
Hidden component that handles the browser's download dialog.
To do this, you link a button to a callback that converts your data (usually a Pandas DataFrame) into a downloadable format.