html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,issue,performed_via_github_app https://github.com/simonw/datasette/issues/1310#issuecomment-829885904,https://api.github.com/repos/simonw/datasette/issues/1310,829885904,MDEyOklzc3VlQ29tbWVudDgyOTg4NTkwNA==,3747136,2021-04-30T06:58:46Z,2021-04-30T07:26:11Z,NONE,"I made it work with openpyxl. I'm not sure all the code under `@hookimpl` is necessary... but it works :) ```python from datasette import hookimpl from datasette.utils.asgi import Response from openpyxl import Workbook from openpyxl.writer.excel import save_virtual_workbook from openpyxl.cell import WriteOnlyCell from openpyxl.styles import Alignment, Font, PatternFill from tempfile import NamedTemporaryFile def render_spreadsheet(rows): wb = Workbook(write_only=True) ws = wb.create_sheet() ws = wb.active ws.title = ""decp"" columns = rows[0].keys() headers = [] for col in columns : c = WriteOnlyCell(ws, col) c.fill = PatternFill(""solid"", fgColor=""DDEFFF"") headers.append(c) ws.append(headers) for row in rows: wsRow = [] for col in columns: c = WriteOnlyCell(ws, row[col]) if col == ""objet"" : c.alignment = Alignment(wrapText = True) wsRow.append(c) ws.append(wsRow) with NamedTemporaryFile() as tmp: wb.save(tmp.name) tmp.seek(0) return Response( tmp.read(), headers={ 'Content-Disposition': 'attachment; filename=decp.xlsx', 'Content-type': 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' } ) @hookimpl def register_output_renderer(): return {""extension"": ""xlsx"", ""render"": render_spreadsheet, ""can_render"": lambda: False} ``` The key part was to find the right function to wrap the spreadsheet object `wb`. `NamedTemporaryFile()` did it! I'll update this issue when the plugin is packaged and ready for broader use.","{""total_count"": 1, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 1, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",870125126, https://github.com/simonw/datasette/issues/1310#issuecomment-828670621,https://api.github.com/repos/simonw/datasette/issues/1310,828670621,MDEyOklzc3VlQ29tbWVudDgyODY3MDYyMQ==,3747136,2021-04-28T18:12:08Z,2021-04-28T18:12:08Z,NONE,"Apparently, beside a string, Reponse could also [work with bytes](https://github.com/simonw/datasette/blob/master/datasette/utils/asgi.py#L338).","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",870125126,