如何对由元组组成的数据框中的第二个值求和，并使用输出在数据框中创建新列

import pandas as pd

data = [(1, 10), (2, 20), (3, 30), (4, 40), (5, 50)]
df = pd.DataFrame(data, columns=['A', 'B'])

df['Sum'] = df['B'].sum()

import pandas as pd

data = [(1, 10), (2, 20), (3, 30), (4, 40), (5, 50)]
df = pd.DataFrame(data, columns=['A', 'B'])
df['Sum'] = df['B'].sum()

print(df)

   A   B  Sum
0  1  10  150
1  2  20  150
2  3  30  150
3  4  40  150
4  5  50  150