Update app.py

app.py

@@ -12,17 +12,23 @@ global_data = None
 def get_data_preview(file):
     global global_data
     global_data = pd.read_csv(file.name)
+    global_data['label'] = np.nan  # Initialize a label column
+    print("Data preview:\n", global_data.head())
     return global_data.head()
 
 def label_data(ranges):
     global global_data
-    for start, end, label in ranges.values:
+    print("Ranges received for labeling:", ranges)
+    for i, (start, end, label) in enumerate(ranges.values):
+        print(f"Processing range {i}: start={start}, end={end}, label={label}")
         global_data.loc[start:end, 'label'] = label
+    print("Data after labeling:\n", global_data.tail())
     return global_data.tail()
 
 def preprocess_data():
     global global_data
-    global_data.drop(columns=global_data.columns[0], axis=1, inplace=True)
+    if 'Unnamed: 0' in global_data.columns:
+        global_data.drop(columns='Unnamed: 0', axis=1, inplace=True)
     global_data.columns = ['raw_eeg', 'label']
     raw_data = global_data['raw_eeg']
     labels_old = global_data['label']