如何在python中读取嵌套的YAML文件中的数据？

import yaml

def read_yaml(file_path):
    with open(file_path, 'r') as file:
        data = yaml.safe_load(file)
    return data

# 读取嵌套的YAML文件
nested_yaml_data = read_yaml('nested.yaml')

# 访问嵌套的数据
value = nested_yaml_data['key1']['key2']['key3']

print(value)

pip install pyyaml