Python yaml.add_multi_constructor() Examples

The following are 3 code examples of yaml.add_multi_constructor(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module yaml , or try the search function .
Example #1
Source File: yaml_parse.py    From TextDetector with GNU General Public License v3.0 7 votes vote down vote up 
def initialize():
    """
    Initialize the configuration system by installing YAML handlers.
    Automatically done on first call to load() specified in this file.
    """
    global is_initialized

    # Add the custom multi-constructor
    yaml.add_multi_constructor('!obj:', multi_constructor_obj)
    yaml.add_multi_constructor('!pkl:', multi_constructor_pkl)
    yaml.add_multi_constructor('!import:', multi_constructor_import)

    yaml.add_constructor('!import', constructor_import)
    yaml.add_constructor("!float", constructor_float)

    pattern = re.compile(SCIENTIFIC_NOTATION_REGEXP)
    yaml.add_implicit_resolver('!float', pattern)

    is_initialized = True


###############################################################################
# Callbacks used by PyYAML
Example #2
Source File: file_loader.py    From cfn-sphere with Apache License 2.0 5 votes vote down vote up 
def get_yaml_or_json_file(cls, url, working_dir):
        """
        Load yaml or json from filesystem or s3
        :param url: str
        :param working_dir: str
        :return: dict
        """
        file_content = cls.get_file(url, working_dir)

        try:
            if url.lower().endswith(".json"):
                return json.loads(file_content, encoding='utf-8')
            elif url.lower().endswith(".template"):
                return json.loads(file_content, encoding='utf-8')
            elif url.lower().endswith(".yml") or url.lower().endswith(".yaml"):
                if hasattr(yaml, 'FullLoader'):
                    loader = yaml.FullLoader
                else:
                    loader = yaml.Loader
                yaml.add_multi_constructor(u"", cls.handle_yaml_constructors, Loader=loader)
                return yaml.load(file_content, Loader=loader)
            else:
                raise CfnSphereException(
                    "Invalid suffix, use [json|template|yml|yaml]")
        except Exception as e:
            raise CfnSphereException(e)
Example #3
Source File: preprocessors.py    From zentral with Apache License 2.0 5 votes vote down vote up 
def __init__(self):
        self.clients = {}
        yaml.add_multi_constructor("!ruby/object:Puppet", default_constructor)