Issue with group functionality

[Vincent Fayolle]

Hello users,

I don't find any place to communicate on a bug ? What is the good way ?

Here is the issue : If I use the plan mode, and group lines (groups and subgroups) the property hidden=True does not works on the subgroups.

Example (you will see on the generated excel file that it's fine for groups but not subgroups (with have a minus instead of plus in groupping)

Thanks for your help to send this issue somewhere.

Vincent

from openpyxl import Workbook

wb = Workbook()
ws = wb.active
ws.title = "Example"

for i in range(1, 50):
    ws[f"A{i}"] = f"Ligne {i}"


ws.row_dimensions.group(start=2, end=25, outline_level=1, hidden=True)
ws.row_dimensions.group(start=27, end=50, outline_level=1, hidden=True)
ws.row_dimensions.group(start=3, end=14, outline_level=2, hidden=True)
ws.row_dimensions.group(start=16, end=25, outline_level=2, hidden=True)



wb.save("c:/temp/example_group.xlsx")

[Charlie Clark]

On 5 Nov 2025, at 21:19, Vincent Fayolle wrote:

> Hello users,

Hi Vincent,

> I don't find any place to communicate on a bug ? What is the good way ?

Use the bug tracker: https://foss.heptapod.net/openpyxl/openpyxl/-/issues

Charlie Clark

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