#1

Importing from a CSV and then set an index column:

df = pd.read_csv('purchases.csv')
print(df)

  Unnamed: 0  apples  oranges
0       June       3        0
1     Robert       2        3
2       Lily       0        7
3      David       1        2

df = df.set_index('Unnamed: 0')
print(df)

            apples  oranges
Unnamed: 0                 
June             3        0
Robert           2        3
Lily             0        7
David            1        2

#2

Set the index column while importing from the CSV:

df = pd.read_csv('purchases.csv', index_col=0)
print(df)

        apples  oranges
June         3        0
Robert       2        3
Lily         0        7
David        1        2