Access last elements of inner multiindex level in pandas dataframe

Question

In a multi index pandas dataframe I want to access the last element of the second index for all values of the first index. The number of levels in

Answer 1

Use groupby with tail:

print (df.groupby(level='first').tail(1))
                     A         B         C
first second                              
bar   two     0.053054 -0.555819  0.589998
baz   one    -0.868676  1.293633  1.339474
foo   three   0.407454  0.738872  1.811894
qux   one    -0.346014 -1.491270  0.446772

because last lost level second:

print (df.groupby(level='first').last())         
              A         B         C
first                              
bar    0.053054 -0.555819  0.589998
baz   -0.868676  1.293633  1.339474
foo    0.407454  0.738872  1.811894
qux   -0.346014 -1.491270  0.446772