Update app.py

app.py

@@ -1,21 +1,21 @@
 import gradio as gr
 
-# Function to dynamically update the student numbers based on the selected class
 def update_dropdown(class_prefix):
-    # Generate student numbers for the selected class
-    return [f"{class_prefix}{str(i).zfill(2)}" for i in range(1, 41)]
+    # Generate a list of student numbers for the class
+    if class_prefix is not None:
+        return [f"{class_prefix}{str(i).zfill(2)}" for i in range(1, 41)]
+    return []
 
-# Define the class options for the first dropdown
+# Define class options for the first dropdown
 class_options = ["5H", "5E", "5RS"]
 
 # Create the Gradio interface
 with gr.Blocks() as demo:
-    # Create the first dropdown with class options
-    class_dropdown = gr.Dropdown(label="Class", choices=class_options)
-    # Initialize the second dropdown with an empty list; it will be updated dynamically
-    student_dropdown = gr.Dropdown(label="Student", choices=[])
+    class_dropdown = gr.Dropdown(label="Class", choices=class_options, value=class_options[0])
+    # Initialize the second dropdown with the values from the first class as default
+    student_dropdown = gr.Dropdown(label="Student", choices=update_dropdown(class_options[0]))
 
-    # When the class dropdown changes, update the student dropdown
+    # Bind the update function to the class dropdown
     class_dropdown.change(fn=update_dropdown, inputs=class_dropdown, outputs=student_dropdown)
 
 # Launch the app