def regex_constructor(loader: yaml.SafeLoader,
node: yaml.nodes.Node) -> re.Pattern:
'''
Returns the regex pattern.
'''
value = loader.construct_scalar(node)
return re.compile(value)
def __call__(self, loader: SafeLoader, node: Node) -> str:
""" Implement the tag constructor interface.
:param loader: YAML loader
:param node: YAML node to process
:return: final value
"""
value = loader.construct_scalar(node)
return Template(value).substitute(self._params)
def _stats_config_constructor(
loader: yaml.SafeLoader,
node: yaml.nodes.ScalarNode) -> StatsStorageConfig:
"""Returns a scalar constructor that instructs PyYAML how to deserialize a StatsStorageConfig
instance from an "arg string" in the format of "<STORAGE_TYPE>:<RUNNING_ENVIRONMENT>:<TAG>:<PATH_OR_BUCKET>".
Args:
loader (yaml.SafeLoader): PyYAML's default SafeLoader instance
node (yaml.nodes.ScalarNode): A YAML scalar node with a string value representing a StatsStorageConfing instance
Returns:
StatsStorageConfig: A StatsStorageConfig instance deserialized from its string scalar representation
"""
return StatsStorageConfig.from_arg_str(loader.construct_scalar(node))
def parent_constructor(loader: SafeLoader, node: Node):
result = attrgetter(loader.construct_scalar(node))(_data)
return result
