This pull request refactors the code in gtfs_rt_helper.py to combine the dataframes more efficiently. Specifically, it removes any rows with null values in the 'trip_id' column from the combined_trip_update_df, combined_stop_time_df, and combined_vehicle_position_df dataframes. This improves the overall performance and accuracy of the code.
This pull request refactors the code in gtfs_rt_helper.py to combine the dataframes more efficiently. Specifically, it removes any rows with null values in the 'trip_id' column from the combined_trip_update_df, combined_stop_time_df, and combined_vehicle_position_df dataframes. This improves the overall performance and accuracy of the code.