adding a row to a MultiIndex DataFrame/Series

Question

I was wondering if there is an equivalent way to add a row to a Series or DataFrame with a MultiIndex as there is with a single index, i.e. using .ix or .loc?

I thou

Answer 1

Update since .ix is depreciated: Today you could do:

# say you have dataframe x
x
Out[78]: 
              a    b       time
indA indB                     
a    i      0.0  NaN 2018-09-12
b    j      1.0  2.0 2018-10-12
c    k      2.0  3.0 2018-11-12
     f      NaN  NaN        NaT
d    i      5.0  NaN        NaT

x.loc[('a','k'),:] = (3.5,6,pd.NaT)

x
Out[80]: 
              a    b       time
indA indB                     
a    i      0.0  NaN 2018-09-12
b    j      1.0  2.0 2018-10-12
c    k      2.0  3.0 2018-11-12
     f      NaN  NaN        NaT
d    i      5.0  NaN        NaT
a    k      3.5  6.0        NaT