CODEWITHSUNDEEP
pythonpandas
user690462
user690462

Reputation: 129

Convert rows into comma separated string in pandas

I have a pandas DataFrame:

from pandas import DataFrame
import pandas as pd
df2 = DataFrame({'a' : ['one', 'one', 'two','two', 'three', 'two', 'one', 'six'], 
                 'b' : ['x', 'y', 'z', 'y', 'x', 'y', 'x', 'x']})

I need to group it using column 'a'. 

df3 = df2.groupby(['a'])

Next, I want to convert the column 'b' into comma-separated strings, the resulting table should look like this:

a       b
---------------

one     j, k, l

two     m, n, o

three   p, q

Does anyone know how to do it without leaving pandas? It seems simple, but can't find a way to do it inside pandas.

Upvotes: 3

Views: 11784

Answers (1)

Jeff
Jeff

Reputation: 129078

edited from @DSM comment

In [12]: df2.groupby('a')['b'].apply(','.join)
Out[12]: 
a
one      x,y,x
six          x
three        x
two      z,y,y
Name: b, dtype: object

Upvotes: 13

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