How can I reorder multi-indexed dataframe columns at a specific level

Question

I have a multi-indexed DataFrame with names attached to the column levels. I\'d like to be able to easily shuffle the columns around so that they match the ord

Answer 1

This is the simplest one that worked for me:

1 - for your selected level, create a list with columns in desired order;

2 - reindex your columns and create a MultiIndex object from that list, keep in mind this returns a tuple;

3 - use the MultiIndex object to reorder your DataFrame.

cols = ['IWWGCW', 'IWWGDW', 'BASE']

new_cols = df.columns.reindex(cols, level = 0)

df.reindex(columns= new_cols[0]) #new_cols is a single item tuple

in one line:

df.reindex(columns= df.columns.reindex(['IWWGCW', 'IWWGDW', 'BASE'], 
level = 0)[0])

voilá