python - pandas - split string and take each couple -


i have dataframe looks that:

         ids   name   john   1,4,8   eric   2,9,17   paul   41,72,78,100

i need take every combination ids , assign new raw, output df should that:

        ids name    john    1,4 john    1,8 john    4,8 eric    2,9 eric    2,17 eric    9,17 paul    41,72 paul    41,78 paul    41,100 paul    72,78 paul    72,100 paul    78,100

i tried several ways none of them start close need.

let's use combinations itertools, pd.series, stack, , reset_index:

from itertools import combinations df.ids.apply(lambda x:pd.series(list(combinations(x.split(','),2))))\       .stack()\       .reset_index(level=1, drop=true)

output:

name john       (1, 4) john       (1, 8) john       (4, 8) eric       (2, 9) eric      (2, 17) eric      (9, 17) paul     (41, 72) paul     (41, 78) paul    (41, 100) paul     (72, 78) paul    (72, 100) paul    (78, 100) dtype: object

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