如何在带有规则的pandas DataFrame中按索引仅保留特定的行集

import pandas as pd

# 创建一个示例DataFrame
data = {'Name': ['John', 'Emma', 'Michael', 'Sophia', 'William'],
        'Age': [25, 30, 35, 40, 45],
        'City': ['New York', 'London', 'Paris', 'Tokyo', 'Sydney']}
df = pd.DataFrame(data)

# 确定要保留的特定行集的索引
keep_indexes = [0, 2, 4]  # 保留第1、3、5行

# 按索引筛选并保留特定的行集
df_filtered = df.loc[keep_indexes]

# 查看筛选后的结果
print(df_filtered)

      Name  Age    City
0     John   25    New York
2  Michael   35    Paris
4  William   45    Sydney