title: Combining python pivot tables
body: <p>I would like to have a dataframe, created by combine only the total row values on two pivot tables and keeping the same column names, including the All column.</p>
  
  <pre><code>testA:
               sum                           
          ALL_APPS                           
  MONTH        2012/08  2012/09  2012/10  All
  DESCRIPTION                                    
  A1            111      112      113     336
  A2            121      122      123     366
  A3            131      132      133     396
  All           363      366      369    1098
  
  testA:
               sum                           
          ALL_APPS                           
  MONTH        2012/08  2012/09  2012/10  All
  DESCRIPTION                                    
  A1            211      212      213     636
  A2            221      222      223     666
  A3            231      232      233     696
  All           663      666      669    1998
  </code></pre>
  
  <p>As I result I would like to have a data frame that would look like:</p>
  
  <pre><code>         2019/08  2019/09  2019/10  All
           363      366      369      1098
           663      666      669      1998
  </code></pre>
  
  <p>I tried: </p>
  
  <pre><code>A=testA.iloc[3]
  B=testB.iloc[3]
  my_series = pd.concat([A,B],axis=1)
  </code></pre>
  
  <p>But it does not do what I expected :(</p>
  
  <pre><code>                         All        All
                MONTH                        
  sum ALL_APPS 2019/08  363.0        NaN
               2019/09  366.0        NaN
               2019/10  369.0        NaN
               All      1098.0       NaN
      CUR_VER  2019/08    NaN       663.0
               2019/09    NaN       666.0
               2019/10    NaN       669.0
               All        NaN       1998.0
  </code></pre>