data/area_based/irurej39.py

def true_code():
    import pandas as pd
    main_data = pd.read_csv("raw_data/main_data.csv")
    main_data['Timestamp'] = pd.to_datetime(main_data['Timestamp'])
    states_data = pd.read_csv("raw_data/State_data.csv")
    ncap_funding_data = pd.read_csv("raw_data/NCAP_Funding.csv")
    
    station_counts = main_data.groupby('state')['station'].nunique().reset_index()
    station_counts.rename(columns={'station': 'num_stations'}, inplace=True)

    merged_df = station_counts.merge(states_data, on='state', how='inner')
    merged_df['stations_per_km2'] = merged_df['num_stations'] / merged_df['area (km2)']
    highest_density_state = merged_df.loc[merged_df['stations_per_km2'].idxmax(), 'state']

    print(highest_density_state)

true_code()