如何根据子集包含从DataFrame中选择行？

import pandas as pd

# 创建一个示例DataFrame
data = {'Name': ['Alice', 'Bob', 'Charlie', 'David'],
        'Age': [25, 30, 35, 40],
        'City': ['New York', 'London', 'Paris', 'Tokyo']}
df = pd.DataFrame(data)

# 定义条件：选择年龄大于等于30的行
condition = df['Age'] >= 30

# 创建布尔索引
bool_index = condition.values

# 选择行
selected_rows = df[bool_index]

print(selected_rows)

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