import pandas as pd

for medal in medal_types:

    file_name = "%s_top5.csv" % medal

    # Read file_name into a DataFrame: medal_df
    medal_df = pd.read_csv(file_name,index_col='Country')

    # Append medal_df to medals
    medals.append(medal_df)

# Concatenate medals: medals
medals = pd.concat(medals,keys=['bronze', 'silver', 'gold'])

# Print medals in entirety
print(medals)
