pandas数据帧中的加号等于

import pandas as pd

df1 = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]})
df2 = pd.DataFrame({'A': [10, 20, 30], 'B': [40, 50, 60]})

result = df1 + df2

print(result)

    A   B
0  11  44
1  22  55
2  33  66

import pandas as pd

df1 = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]})
df2 = pd.DataFrame({'B': [10, 20, 30], 'C': [40, 50, 60]})

result = df1 + df2

print(result)

    A     B   C
0 NaN  14.0 NaN
1 NaN  25.0 NaN
2 NaN  36.0 NaN