DataGrid not showing using ui.output_data_frame

[remylegoff]

I'm using DataGrid and render.data_frame to be able to do row selection but the data frame is not displaying. When debugging, the returned object is a DataGrid shiny object. If I'm using basic pd.DataFrame everything is right.

Here, the server part :

@output
@render.data_frame
def feature_selection():
  meth = input.meth_graph()
  results = tranformed_data().dict_results[meth][2]
  to_return =  pd.DataFrame([raw_data().features,results]).T
  return render.DataGrid(
    to_return,
    row_selection_mode = 'multiple')

Here the ui part :

ui.nav(
  ui.row(
    ui.output_data_frame('feature_selection')
  )
)

[gshotwell]

I'm not able to replicate this, can you post a more complete example?

This code works:

from shiny import module, ui, render, reactive, event, App, Inputs, Outputs, Session
import pandas as pd
import numpy as np

df = pd.DataFrame(
    {
        "A": np.random.rand(5),
        "B": np.random.rand(5),
        "C": np.random.rand(5),
        "D": np.random.rand(5),
        "E": np.random.rand(5),
        "F": np.random.rand(5),
    }
)

app_ui = ui.page_fluid(
    ui.output_data_frame("my_df"),
)


def server(input: Inputs, output: Outputs, session: Session):
    @output
    @render.data_frame
    def my_df():
        return render.DataGrid(df, row_selection_mode="multiple")


app = App(app_ui, server)

[remylegoff]

here is a bit more of context from the ui part:

ui.navset_tab(
                                ui.nav('Données complètes', ui.output_data_frame('data_display')),
                                ui.nav(
                                    'Statistiques Descriptives',
                                    ui.page_fluid(
                                        ui.row(
                                            'Statistiques descriptives en retirant les 0',
                                            ui.output_data_frame('stats_descriptives')
                                            ),
                                        ui.row(
                                            'Visualisation graphiques',
                                            ui.input_text('col_boxplot','Colonnes à visualiser', placeholder = 'Séparées par ;'),
                                            ui.output_plot('boxplot')
                                            ),
                                        ui.row('Fréquence des différentes classes',
                                               ui.output_plot('frequence_classe'))
                                        )
                                    ),
                                ui.nav('Selection de variable',
                                       ui.output_data_frame('feature_selection'))
)

So it's in a big app with lot of tabs, sub tabs and it's the only thing not working.
The server part that is related to the display more than the render function is a bit too complex to put it here. But I don't think it comes from the server because the return object is a DataGrid

[remylegoff]

I'm using shiny 0.5.1, shinywidgets 0.2.1, pandas 2.0.3, python 3.11.4 on windows with VScode

[rh-atx]

Hey @gshotwell I tried running your example, and unfortunately nothing rendered to the screen. I am also using shiny 0.5.1 and am experiencing this issue with render.DataGrid. I've noticed this only occurs when I'm using Safari, though. Thanks!

[gshotwell]

@rh-atx I'm not able to reproduce that on Safari, is anything else different? Which version of Python are you on?

[remylegoff]

Another forum post on the discord answer the question. The column names must be string and not index to work. I don't know if it will help improve the functions but when column names are transform to string, it works well.