I have this df, I want to group only the country (i'm not sure how to say it)
country region date dailyvisit
canada Alberta 2020-01-22 5
canada Manitoba 2020-01-22 2
australia Queensland 2020-01-22 4
australia New South Wales 2020-01-22 5
canada Grand Princess 2020-01-23 5
australia Queensland 2020-01-23 4
so it will be like this
country date dailyvisit
canada 2020-01-22 7
australia 2020-01-22 9
canada 2020-01-23 5
australia 2020-01-23 4
