Fix: Annotation dataframe handling

app.py

@@ -294,6 +294,10 @@ def load_first_example(participant_id, ann_completed, current_index):
         print(len(annotations))
         ann_completed = gr.Number(len(annotations) - 1, visible=False)
         print(len(annotations))
+    else: 
+        # Initialize an empty DataFrame to store annotations
+        annotations = pd.DataFrame(columns=['sample_id', 'sentence', 'emotion', 'confidence', 'comments', 'n_clicks'])
+
     return *load_example(current_index), ann_completed, current_index
     
 def load_example(index):
@@ -401,9 +405,7 @@ with (gr.Blocks(theme=gr.themes.Soft(), css = css) as demo):
     # List of all audio files to annotate
 
 
-    # Initialize an empty DataFrame to store annotations
-    annotations = pd.DataFrame(columns=['sample_id', 'sentence', 'emotion', 'confidence', 'comments', 'n_clicks'])
-
+    
     # Instructions for emotion annotation
     with gr.Sidebar(open = False) as sidebar:
         participant_id = gr.Textbox(label='What is your participant ID?', interactive = True)