使用'groupby‘方法获取Dataframe的所有列

import pandas as pd

# 创建一个示例Dataframe
data = {'A': ['foo', 'bar', 'foo', 'bar', 'foo', 'bar', 'foo', 'foo'],
        'B': ['one', 'one', 'two', 'two', 'two', 'one', 'two', 'one'],
        'C': [1, 2, 3, 4, 5, 6, 7, 8],
        'D': [10, 20, 30, 40, 50, 60, 70, 80]}
df = pd.DataFrame(data)

# 使用'groupby'方法获取Dataframe的所有列
grouped = df.groupby(['A', 'B'])
result = grouped.sum()

print(result)

         C    D
A   B         
bar one  20   80
    two  4    40
foo one  9    90
    two  10   100