如何用字符串值解析yaml文件

对于下面的示例,我试图读取这个yaml文件,解析它并在 data 标记到新的yaml文件。使用 yaml.load() 我无法区分字符串和int值。

data:
    key1: "Value1"
    key2: Value2

我当前正在解析python代码:

import io
import yaml

test_dict={}
with open("sample-string.yaml", "r") as stream:
    try:
        f = yaml.load(stream)
        test_dict['data'] = f['data']
    except yaml.YAMLError as exc:
        print(exc)

with io.open("output.yaml", "a",encoding="utf-8") as wf:
    try:
        yaml.dump(test_dict['data'],wf,allow_unicode=True,default_flow_style=False)
    except yaml.YAMLError as exc:
        print(exc)

key1: Value1
key2: Value2

如您所见,的值缺少引号 key1 i、 e.应该是 "Value1" 而不是 Value1 . 关于如何实现这一点,有什么建议吗?

预期输出

key1: "Value1"
key2: Value2