Fix the generation of the "multiindex" polars df

docs/changelog.md

@@ -1,6 +1,14 @@
 ITables ChangeLog
 =================
 
+2.1.5-dev (2024-08-??)
+------------------
+
+**Fixed**
+- We have adjusted the generation of the Polars sample dataframes to fix the CI ([Polars-18130](https://github.com/pola-rs/polars/issues/18130))
+- The test on the Shiny app fallbacks to `ui.nav_panel` when `ui.nav` is not available
+
+
 2.1.4 (2024-07-03)
 ------------------
 

src/itables/sample_dfs.py

@@ -267,9 +267,15 @@ def get_dict_of_test_dfs(N=100, M=100, polars=False):
         import pyarrow as pa
 
         polars_dfs = {}
-        for key in test_dfs:
+        for key, df in test_dfs.items():
+            if key == "multiindex":
+                # Since Polars 1.2, pl.from_pandas fails with this error:
+                # ValueError: Pandas dataframe contains non-unique indices and/or column names.
+                # Polars dataframes require unique string names for columns.
+                # See https://github.com/pola-rs/polars/issues/18130
+                df.index = df.index.tolist()
             try:
-                polars_dfs[key] = pl.from_pandas(test_dfs[key])
+                polars_dfs[key] = pl.from_pandas(df)
             except (pa.ArrowInvalid, ValueError):
                 pass
         return polars_dfs

tests/sample_python_apps/itables_in_a_shiny_app.py

@@ -1,3 +1,4 @@
+# Run this app with "shiny run file.py"
 from shiny import App, ui
 
 from itables.sample_dfs import get_countries
@@ -8,4 +9,3 @@
 app_ui = ui.page_fluid(ui.HTML(DT(df)))
 
 app = App(app_ui, server=None)
-# app.run()

tests/sample_python_apps/itables_in_a_shiny_app_with_tabs.py

@@ -1,14 +1,20 @@
+# Run this app with "shiny run file.py"
 from shiny import App, ui
 
 from itables.sample_dfs import get_dict_of_test_dfs
 from itables.shiny import DT
 
+try:
+    # This one is not available on the CI (Python 3.8)
+    ui_nav = ui.nav
+except AttributeError:
+    ui_nav = ui.nav_panel
+
 app_ui = ui.page_fluid(
     # Display the different tables in different tabs
     ui.navset_tab(
-        *[ui.nav(name, ui.HTML(DT(df))) for name, df in get_dict_of_test_dfs().items()]
+        *[ui_nav(name, ui.HTML(DT(df))) for name, df in get_dict_of_test_dfs().items()]
     )
 )
 
 app = App(app_ui, server=None)
-# app.run()