Index pandas DataFrame by column numbers, when column names are integers

Question

I am trying to keep just certain columns of a DataFrame, and it works fine when column names are strings:

In [2]: import numpy as np

In [3]: import pandas as pd         


        

Answer 1

This is exactly the purpose of iloc, see here

In [37]: df
Out[37]: 
   10  11  12  13  14  15  16
x   0   1   2   3   4   5   6
y   7   8   9  10  11  12  13
u  14  15  16  17  18  19  20
z  21  22  23  24  25  26  27
w  28  29  30  31  32  33  34

In [38]: df.iloc[:,[1,3]]
Out[38]: 
   11  13
x   1   3
y   8  10
u  15  17
z  22  24
w  29  31