[ BUG] Default table "editable" behaviour broken when df has index

Author: arcanaxionCreated Oct 22, 2025Updated Aug 27, 2026

Labels🆘 Help wantedgood first issueGUI: Front-End

What went wrong?

Example code:

python

import pandas as pd
import taipy.gui.builder as tgb
from taipy.gui import Gui

df = pd.DataFrame({"A": ["a1", "a2", "a3"], "B": ["b1", "b2", "b3"]})
df.set_index("A", inplace=True)

with tgb.Page() as page:
    tgb.table("{df}", editable=True)

if __name__ == "__main__":
    gui = Gui(page=page)
    gui.run(title="Default editable behaviour broken when dataframe has index")

Delete and add print following warnings:

/project/.venv-4.1.0/lib/python3.10/site-packages/taipy/gui/gui.py:1794: TaipyGuiWarning: Gui.table_on_add() failed potentially from a table's on_add callback.:
can only concatenate str (not "int") to str
  _warn("Gui.table_on_add() failed potentially from a table's on_add callback.", e)
/project/.venv-4.1.0/lib/python3.10/site-packages/taipy/gui/gui.py:1810: TaipyGuiWarning: Gui.table_on_delete() failed potentially from a table's on_delete callback.:
'[0] not found in axis'
  _warn("Gui.table_on_delete() failed potentially from a table's on_delete callback.", e)

Edit doesn't modify the edited cell and instead appends a new row

Taipy Version

4.1

Additional Context (Optional)

bash

Code of Conduct

I have checked the existing issues to avoid duplicates.
I am willing to work on this issue (optional)

✅ Acceptance Criteria

A reproducible unit test is added.
Code coverage is at least 90%.
The bug reporter validated the fix.
Relevant documentation updates or an issue created in

Source: Avaiga/taipy

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