Select from Second Level: Pandas Practice Problem (Medium)

45. Select from Second Level

Medium Locked

Select the labels 1, 3 and 6 from the second level of the MultiIndexed Series s.

Input

A  0     0
   1     1
   2     2
   3     3
   4     4
        ..
C  5    25
   6    26
   7    27
   8    28
   9    29
Length: 30, dtype: int64

Output

A  1     1
   3     3
   6     6
B  1    11
   3    13
   6    16
C  1    21
   3    23
   6    26
dtype: int64

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