如何在python中编码这种情况，组合两个具有不同单元格的重复行

import pandas as pd

data = {'A': ['foo', 'bar', 'foo', 'bar'],
        'B': [1, 2, 3, 4],
        'C': ['x', 'y', 'z', 'w']}
df = pd.DataFrame(data)

df_combined = df.groupby(['A']).apply(lambda x: ', '.join(x['C'])).reset_index()

import pandas as pd

data = {'A': ['foo', 'bar', 'foo', 'bar'],
        'B': [1, 2, 3, 4],
        'C': ['x', 'y', 'z', 'w']}
df = pd.DataFrame(data)

df_combined = df.groupby(['A']).apply(lambda x: ', '.join(x['C'])).reset_index()

print(df_combined)

     A    0
0  bar  y, w
1  foo  x, z