Update app.py

app.py

@@ -678,6 +678,7 @@ with gr.Blocks(css="""
 
             # To use your preferred DeepMIMO scenarios for the custom dataset, please [clone the model and datasets](https://huggingface.co/wi-lab/lwm) and follow the instructions below:
             from input_preprocess import DeepMIMO_data_gen deepmimo_data_cleaning label_gen # Import required modules from the model repository
+            import numpy as np
             scenario_names = np.array([
                 "city_18_denver", "city_15_indianapolis", "city_19_oklahoma", 
                 "city_12_fortworth", "city_11_santaclara", "city_7_sandiego"