code: def get_most_popular_stations():
      df = pd.read_sql(
          """
      SELECT COUNT(ride_id) as n, MAX(start_station_name) as station
      FROM RIDES
      WHERE start_station_name is NOT NULL
      GROUP BY start_station_id
      ORDER BY n DESC
      LIMIT 5
      """,
          con=connection_string,
      )
      return df
  
imports: import os
  import gradio
  import pandas
label_desc: Use image node_id 2 for calling a global function with example usage: get_most_popular_stations() and returns: df