如何在包含占位符的字典中加载yaml文件内容？

pip install pyyaml

import yaml

def parse_yaml_with_placeholders(yaml_file, placeholders):
    with open(yaml_file, 'r') as file:
        yaml_content = file.read()

    for placeholder, value in placeholders.items():
        placeholder = f'${{{placeholder}}}'
        yaml_content = yaml_content.replace(placeholder, value)

    data = yaml.safe_load(yaml_content)

    return data

# 示例调用
placeholders = {
    'placeholder1': 'value1',
    'placeholder2': 'value2'
}
data = parse_yaml_with_placeholders('example.yaml', placeholders)