pandas中相似条件的不同索引返回值类型

import pandas as pd

data = {'Name': ['Alice', 'Bob', 'Charlie', 'David'],
        'Age': [25, 30, 35, 40],
        'City': ['New York', 'London', 'Paris', 'Tokyo']}
df = pd.DataFrame(data)

condition = df['Age'] >= 30
result = df[condition]

     Name  Age     City
1     Bob   30   London
2  Charlie   35    Paris
3    David   40    Tokyo

condition = df['Age'] >= 30
result = df.loc[condition, 'Name']

1       Bob
2    Charlie
3      David
Name: Name, dtype: object