Update pages/chapter_index.py

pages/chapter_index.py

@@ -29,13 +29,20 @@ def dataframe_with_selections(df_chapters: pd.DataFrame, init_value: bool = Fals
     selected_rows = edited_df[edited_df.Select]
     return selected_rows.drop('Select', axis=1)
 
+if "selected_chapters" is not in st.session_state:
+    st.session_state['selected_chapters'] = []
+
+selected_chapters_list = st.session_state.selected_chapters
+
 selected_chapters = dataframe_with_selections(df_chapters)
 st.write("Your selection:")
 st.write(selected_chapters)
-
 selected_chapters_list = selected_chapters.iloc[:,0].tolist()
 #st.write("ZZZZZZZZZZ: ", selected_chapters_list)
 
+if selected_chapters is not None:
+    st.session_state.selected_chapters = selected_chapters_list
+
 #'Procedures on nervous system'
 #'Procedures on endocrine system'
 #'Procedures on eye and adnexa'