So the question is how to reorder your columns in a custom way.
For example you have the following DF and you want to reorder your columns in the following way (indices):
5, 3, rest...
DF
In [82]: df
Out[82]:
A B C D E F G
0 1 0 0.5 5 1 7 6
1 2 0 0.6 4 0 7 6
2 3 0 0.7 3 1 7 6
3 4 0 0.8 2 0 7 6
columns
In [83]: cols = df.columns.tolist()
In [84]: cols
Out[84]: ['A', 'B', 'C', 'D', 'E', 'F', 'G']
reordered:
In [88]: cols = [cols.pop(5)] + [cols.pop(3)] + cols
In [89]: cols
Out[89]: ['F', 'D', 'A', 'B', 'C', 'E', 'G']
In [90]: df[cols]
Out[90]:
F D A B C E G
0 7 5 1 0 0.5 1 6
1 7 4 2 0 0.6 0 6
2 7 3 3 0 0.7 1 6
3 7 2 4 0 0.8 0 6
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