I need to fetch each country's name once from the country column. https://raw.githubusercontent.com/resbaz/r-novice-gapminder-files/master/data/gapminder-FiveYearData.csv I wrote this code, but each country's name appears more than one time. I need to know how many countries name are there..how will I do that?
df1=pd.read_csv('FiveYearData.csv')
print(df1)
df2 = df1['country']
print(df2)
