如何在groupby python dataframe中找到最大值

import pandas as pd

data = {'Group': ['A', 'A', 'B', 'B', 'B', 'C'],
        'Value': [10, 20, 15, 25, 30, 5]}
df = pd.DataFrame(data)

max_values = df.groupby('Group')['Value'].max()

max_values = df.groupby('Group')[['Value1', 'Value2', ...]].max()

agg_values = df.groupby('Group').agg({'Value': 'max', 'OtherColumn': 'mean', ...})