Download Decorator Apr 2026

: If the function returns a string, it is treated as a path to an existing file on disk.

: The decorated function executes when a user clicks a specific download button or link in the UI. Return Types :

: Modern download decorators typically support both synchronous and async functions to prevent UI freezing during large file generations. Related Tools for Report Generation Download Decorator

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: Using decorators allows core business logic (e.g., calculate_sales() ) to remain clean, while the decorator handles logging, execution timing, or formatting the output into a downloadable file. : If the function returns a string, it

In the Shiny for Python framework, the @render.download decorator registers a function to handle a user-initiated download.

: For temporary files or large data, the function can yield strings or bytestrings, allowing the app to clean up resources after the download completes. Related Tools for Report Generation If your goal

: It requires parameters like filename (the name of the file presented to the user) and media_type (the MIME type, such as text/csv or application/pdf ). Implementation Best Practices