Q:

Dataframe Pandas Python top row above all columns

I am trying to add a common column for all other columns for a dataframe using pandas in python. 
I currently have: 
                 Flow    %   Z-score
Name1             262  0.2%   0.1
Name2             924  1.6%   1.0

And trying to do:
                  Combined
             Flow   %   Z-score
Name1         262  0.2%   0.1
Name2         924  1.6%   1.0

Any suggestions?

A:

I think need MultiIndex:
df.columns = pd.MultiIndex.from_product([['Combined'], df.columns])

Or:
df.columns = [['Combined'] * len(df.columns), df.columns]

df.columns = pd.MultiIndex.from_product([['Combined'], df.columns])
print (df)
      Combined              
          Flow     % Z-score
Name1      262  0.2%     0.1
Name2      924  1.6%     1.0

