Drop duplicate in multiindex dataframe in pandas

问题

I am looking to an efficient method to drop duplicate columns in a multiindex dataframe with Pandas.

My data :

TypePoint      TIME     Test   ...         T1      T1
-                 S    Unit1   ...       unit    unit
(POINT, -)                     ...                   
24001         90.00  100.000   ...     303.15  303.15
24002        390.00  101.000   ...     303.15  303.15
            ...      ...   ...        ...     ...
24801         10000  102.000   ...     303.15  303.15
24802         10500  103.000   ...     303.15  303.15

The header contain two information. The variable's name and its unit. I would like to drop the variable "T1" (duplicate variable).

• .drop_duplicates() don't work. I get "Buffer has wrong number of dimensions (expected 1, got 2)" error.

• .drop(Data('T1','unit'),axis=1) don't work either. That drop the two column and not just only one of them.

Thanks for your help

回答1:

I think you can use double T:

print df
  TypePoint   TIME  Test      T1        
          -      S Unit1    unit    unit
0     24001     90   100  303.15  303.15
1     24002    390   101  303.15  303.15
2     24801  10000   102  303.15  303.15
3     24802  10500   103  303.15  303.15

print df.T.drop_duplicates().T
  TypePoint   TIME  Test      T1
          -      S Unit1    unit
0     24001     90   100  303.15
1     24002    390   101  303.15
2     24801  10000   102  303.15
3     24802  10500   103  303.15

来源：https://stackoverflow.com/questions/35888189/drop-duplicate-in-multiindex-dataframe-in-pandas