python - Split Multilevel dataframe into different csv files -


suppose have following dataframe :

    x       y    ---+---+---+---     | b | | b --+---+---+---+--- 0 | 1 | 2 | 3 | 4 1 | 5 | 6 | 7 | 8 2 | 9 | 10| 11| 12

i want split based on multilevel index recursively , save them in csv file.

for example file name x_a.csv should contain following dataframe:

    x     ---      --+--- 0 | 1  1 | 5  2 | 9

similarly file x_b.csv should store dataframe :

    x     ---     b  --+--- 0 | 2  1 | 6  2 | 10

and on y_a , y_b.

i looking pythonic ( or efficient) way rather iterating on column values separately code quite large. tried using techniques mentioned here dropping column levels , storing individual columns want in such way don't have explicitly mention column names since dataframe may expand ( i.e. @ top level there might 4 columns w, x, y , z). 

list_of_df = [df[i].to_frame() in df.columns]

with @johngalt's suggestion csv:

_ = [df[i].to_frame().to_csv('{0}_{1}'.format(*i)) in df.columns]

output:

list_of_df[0]

   x    0  1 1  5 2  9

list_of_df[1]

    x     b 0   2 1   6 2  10

...

list_of_df[3]

    y     b 0   4 1   8 2  12

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