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,