import pandas as pd

def find_top_3_medians():
     # Read csv
    df = pd.read_csv('country_vaccination_stats.csv')
    # Missing values --> 0
    df['daily_vaccinations'].fillna(0, inplace=True)
    # Calculate the median 
    median_vaccinations_per_country = df.groupby('country')['daily_vaccinations'].median()
    # Sort them according to the median value.
    sorted_countries = median_vaccinations_per_country.sort_values(ascending=False)

    return sorted_countries.head(3)
def main():
    
    print(find_top_3_medians())
     


if __name__ == '__main__':
    main()