I want to set the following multiindexes to a pandas.Series . Currently, my indexes are [none, none], how can I change them?
Letters         bins
A              (2.212, 15.753]     4
               (15.753, 29.227]    1
B              (2.212, 15.753]     1
C              (2.212, 15.753]     1
               (15.753, 29.227]    3
               (29.227, 42.701]    2
D              (2.212, 15.753]     1
               (56.174, 69.648]    1
E              (56.174, 69.648]    1
 
    