python - How do I assign series or sequences to dask dataframe column? -

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my dask dataframe follwing:

in [65]: df.head() out[65]:    id_orig  id_cliente  id_cartao  inicio_processo  fim_processo  score  \ 0      1.0         1.0        1.0              1.0           1.0    1.0 1      1.0         1.0        1.0              1.0           1.0    1.0 2      1.0         1.0        1.0              1.0           1.0    1.0 3      1.0         1.0        1.0              1.0           1.0    1.0 4      1.0         1.0        1.0              1.0           1.0    1.0     automatico  canal  aceito  motivo_recusa  variante 0         1.0    1.0     1.0            1.0       1.0 1         1.0    1.0     1.0            1.0       1.0 2         1.0    1.0     1.0            1.0       1.0 3         1.0    1.0     1.0            1.0       1.0 4         1.0    1.0     1.0            1.0       1.0

assigning integer works:

in [92]: df = df.assign(id_cliente=999)  in [93]: df.head() out[93]:    id_orig  id_cliente  id_cartao  inicio_processo  fim_processo  score  \ 0      1.0         999        1.0              1.0           1.0    1.0 1      1.0         999        1.0              1.0           1.0    1.0 2      1.0         999        1.0              1.0           1.0    1.0 3      1.0         999        1.0              1.0           1.0    1.0 4      1.0         999        1.0              1.0           1.0    1.0     automatico  canal  aceito  motivo_recusa  variante 0         1.0    1.0     1.0            1.0       1.0 1         1.0    1.0     1.0            1.0       1.0 2         1.0    1.0     1.0            1.0       1.0 3         1.0    1.0     1.0            1.0       1.0 4         1.0    1.0     1.0            1.0       1.0

however no other method assigning series or other iterable in existing columns works.

how can achieve that?

dataframe.assign accepts scalar or dd.series

df = df.assign(a=1)  # accepts scalars df = df.assign(z=df.x + df.y)  # accepts dd.series objects

if trying assign numpy array or python list might data small enough fit in ram, , pandas might better fit dask.dataframe.

you can use plain setitem syntax

df['a'] = 1 df['z'] = df.x + df.y

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