涉及代码模块，项目git地址：https://github.com/YueChen-C/YamlAppium.git
class YamlFile(pytest.File):
def collect(self):
import yaml
raw = yaml.safe_load(self.fspath.open(encoding=‘utf-8’))
for name, values in raw.items():
yield YamlTest(name, self, values)
运行时错误提示如下，应该要如何优化代码
=================================== ERRORS ====================================
________________________ ERROR collecting test session ________________________
Direct construction of YamlFile has been deprecated, please use YamlFile.from_parent.
See Deprecations and Removals — pytest documentation for more details.
=========================== short test summary info ===========================
ERROR …....
!!! Interrupted: 1 error during collection !!!
============================== 1 error in 0.60s ===============================