How to use the stix2.base._STIXBase function in stix2

def __init__(self, **kwargs):
            _STIXBase.__init__(self, **kwargs)
            _cls_init(cls, self, kwargs)

"""STIX 2 Bundle object"""

from .base import _STIXBase
from .properties import IDProperty, Property, TypeProperty


class Bundle(_STIXBase):

    _type = 'bundle'
    _properties = {
        'type': TypeProperty(_type),
        'id': IDProperty(_type),
        'spec_version': Property(fixed="2.0"),
        'objects': Property(),
    }

    def __init__(self, *args, **kwargs):
        # Add any positional arguments to the 'objects' kwarg.
        if args:
            if isinstance(args[0], list):
                kwargs['objects'] = args[0] + list(args[1:]) + kwargs.get('objects', [])
            else:
                kwargs['objects'] = list(args) + kwargs.get('objects', [])

import stix2

from .base import _STIXBase
from .exceptions import CustomContentError, ParseError
from .markings import _MarkingsMixin
from .utils import _get_dict

STIX2_OBJ_MAPS = {}


class STIXDomainObject(_STIXBase, _MarkingsMixin):
    pass


class STIXRelationshipObject(_STIXBase, _MarkingsMixin):
    pass


def parse(data, allow_custom=False, version=None):
    """Convert a string, dict or file-like object into a STIX object.

    Args:
        data (str, dict, file-like object): The STIX 2 content to be parsed.
        allow_custom (bool): Whether to allow custom properties as well unknown
            custom objects. Note that unknown custom objects cannot be parsed
            into STIX objects, and will be returned as is. Default: False.
        version (str): If present, it forces the parser to use the version
            provided. Otherwise, the library will make the best effort based
            on checking the "spec_version" property. If none of the above are
            possible, it will use the default version specified by the library.

"""For more detailed information on this object's properties, see
    `the STIX 2.1 specification `__.
    """

    _properties = OrderedDict([
        ('lang', StringProperty()),
        ('marking_ref', ReferenceProperty(valid_types='marking-definition', spec_version='2.1')),
        ('selectors', ListProperty(SelectorProperty, required=True)),
    ])

    def _check_object_constraints(self):
        super(GranularMarking, self)._check_object_constraints()
        self._check_at_least_one_property(['lang', 'marking_ref'])


class LanguageContent(_STIXBase):
    # TODO: Add link
    """For more detailed information on this object's properties, see
    `the STIX 2.1 specification `__.
    """

    _type = 'language-content'
    _properties = OrderedDict([
        ('type', TypeProperty(_type)),
        ('spec_version', StringProperty(fixed='2.1')),
        ('id', IDProperty(_type, spec_version='2.1')),
        ('created_by_ref', ReferenceProperty(valid_types='identity', spec_version='2.1')),
        ('created', TimestampProperty(default=lambda: NOW, precision='millisecond')),
        ('modified', TimestampProperty(default=lambda: NOW, precision='millisecond')),
        ('object_ref', ReferenceProperty(valid_types=["SCO", "SDO", "SRO"], spec_version='2.1', required=True)),
        # TODO: 'object_modified' it MUST be an exact match for the modified time of the STIX Object (SRO or SDO) being referenced.
        ('object_modified', TimestampProperty(precision='millisecond')),

def is_marking(obj_or_id):
    """Determines whether the given object or object ID is/is for a marking
    definition.

    :param obj_or_id: A STIX object or object ID as a string.
    :return: True if a marking definition, False otherwise.
    """

    if isinstance(obj_or_id, (stix2.base._STIXBase, dict)):
        result = obj_or_id["type"] == "marking-definition"
    else:
        # it's a string ID
        result = obj_or_id.startswith("marking-definition--")

    return result

version (str): If present, it forces the parser to use the version
                provided. Otherwise, the library will make the best effort based
                on checking the "spec_version" property.

        Note:
            ``stix_data`` can be a Bundle object, but each object in it will be
            saved separately; you will be able to retrieve any of the objects
            the Bundle contained, but not the Bundle itself.

        """
        if isinstance(stix_data, (v20.Bundle, v21.Bundle)):
            # recursively add individual STIX objects
            for stix_obj in stix_data.get("objects", []):
                self.add(stix_obj, version=version)

        elif isinstance(stix_data, _STIXBase):
            # adding python STIX object
            self._check_path_and_write(stix_data)

        elif isinstance(stix_data, (str, dict)):
            stix_data = parse(stix_data, allow_custom=self.allow_custom, version=version)
            self.add(stix_data, version=version)

        elif isinstance(stix_data, list):
            # recursively add individual STIX objects
            for stix_obj in stix_data:
                self.add(stix_obj)

        else:
            raise TypeError(
                "stix_data must be a STIX object (or list of), "
                "JSON formatted STIX (or list of), "

def clean(self, value):
        try:
            iter(value)
        except TypeError:
            raise ValueError("must be an iterable.")

        if isinstance(value, (_STIXBase, string_types)):
            value = [value]

        result = []
        for item in value:
            try:
                valid = self.contained.clean(item)
            except ValueError:
                raise
            except AttributeError:
                # type of list has no clean() function (eg. built in Python types)
                # TODO Should we raise an error here?
                valid = item

            if type(self.contained) is EmbeddedObjectProperty:
                obj_type = self.contained.type
            elif type(self.contained).__name__ == "STIXObjectProperty":

class ExternalReference(_STIXBase):
    _properties = OrderedDict()
    _properties.update([
        ('source_name', StringProperty(required=True)),
        ('description', StringProperty()),
        ('url', StringProperty()),
        ('external_id', StringProperty()),
    ])

    def _check_object_constraints(self):
        super(ExternalReference, self)._check_object_constraints()
        self._check_at_least_one_property(["description", "external_id", "url"])


class KillChainPhase(_STIXBase):
    _properties = OrderedDict()
    _properties.update([
        ('kill_chain_name', StringProperty(required=True)),
        ('phase_name', StringProperty(required=True)),
    ])


class GranularMarking(_STIXBase):
    _properties = OrderedDict()
    _properties.update([
        ('marking_ref', ReferenceProperty(required=True, type="marking-definition")),
        ('selectors', ListProperty(SelectorProperty, required=True)),
    ])


class TLPMarking(_STIXBase):

"""

    _properties = OrderedDict([
        ('source_name', StringProperty(required=True)),
        ('description', StringProperty()),
        ('url', StringProperty()),
        ('hashes', HashesProperty(spec_version='2.1')),
        ('external_id', StringProperty()),
    ])

    def _check_object_constraints(self):
        super(ExternalReference, self)._check_object_constraints()
        self._check_at_least_one_property(['description', 'external_id', 'url'])


class KillChainPhase(_STIXBase):
    # TODO: Add link
    """For more detailed information on this object's properties, see
    `the STIX 2.1 specification `__.
    """

    _properties = OrderedDict([
        ('kill_chain_name', StringProperty(required=True)),
        ('phase_name', StringProperty(required=True)),
    ])


class GranularMarking(_STIXBase):
    # TODO: Add link
    """For more detailed information on this object's properties, see
    `the STIX 2.1 specification `__.
    """

class RasterImageExt(_Extension):
    # TODO: Add link
    """For more detailed information on this object's properties, see
    `the STIX 2.1 specification `__.
    """

    _type = 'raster-image-ext'
    _properties = OrderedDict([
        ('image_height', IntegerProperty()),
        ('image_width', IntegerProperty()),
        ('bits_per_pixel', IntegerProperty()),
        ('exif_tags', DictionaryProperty(spec_version='2.1')),
    ])


class WindowsPEOptionalHeaderType(_STIXBase):
    # TODO: Add link
    """For more detailed information on this object's properties, see
    `the STIX 2.1 specification `__.
    """

    _properties = OrderedDict([
        ('magic_hex', HexProperty()),
        ('major_linker_version', IntegerProperty()),
        ('minor_linker_version', IntegerProperty()),
        ('size_of_code', IntegerProperty(min=0)),
        ('size_of_initialized_data', IntegerProperty(min=0)),
        ('size_of_uninitialized_data', IntegerProperty(min=0)),
        ('address_of_entry_point', IntegerProperty()),
        ('base_of_code', IntegerProperty()),
        ('base_of_data', IntegerProperty()),
        ('image_base', IntegerProperty()),