Listagg In Pandas

Equivalent of Listagg in python pandas.

Convert multiple column values as list.

# import pandas library
import pandas as pd

# create a dataframe
df = pd.DataFrame({'a': ['A', 'A', 'B',
                        'B', 'B', 'C',
                        'C', 'D'],
                    'b': [1, 2, 5,
                        3, 5, 4,
                        8, 6]})
        
# convert values of each group
# into a list
groups = df.groupby('a')['b'].apply(list)

print(groups)

# groups store in a new
# column called listvalues
df1 = groups.reset_index(name
            = 'listvalues')
# show the dataframe
df1

Convert multiple column values as Json array.

# import pandas and json library
import pandas as pd
import json

# create a dataframe
df = pd.DataFrame({'a': ['A', 'A', 'B',
                        'B', 'B', 'C',
                        'C', 'D'],
                    'b': [1, 2, 5,
                        3, 5, 4,
                        8, 6]})
        
# convert values of each group
# into a list
groups = df.groupby('a')['b'].apply(lambda x: json.dumps(list(x)))

print(groups)

# groups store in a new
# column called listvalues
df1 = groups.reset_index(name
            = 'listvalues')
# show the dataframe
df1