How to use the srsly.ruamel_yaml.constructor.ConstructorError function in srsly

for subnode in value_node.value:
                        if not isinstance(subnode, MappingNode):
                            raise ConstructorError(
                                "while constructing a mapping",
                                node.start_mark,
                                "expected a mapping for merging, but found %s"
                                % subnode.id,
                                subnode.start_mark,
                            )
                        self.flatten_mapping(subnode)
                        submerge.append(subnode.value)
                    submerge.reverse()
                    for value in submerge:
                        merge.extend(value)
                else:
                    raise ConstructorError(
                        "while constructing a mapping",
                        node.start_mark,
                        "expected a mapping or list of mappings for merging, "
                        "but found %s" % value_node.id,
                        value_node.start_mark,
                    )
            elif key_node.tag == u"tag:yaml.org,2002:value":
                key_node.tag = u"tag:yaml.org,2002:str"
                index += 1
            else:
                index += 1
        if bool(merge):
            node.merge = (
                merge
            )  # separate merge keys to be able to update without duplicate
            node.value = merge + node.value

def construct_yaml_binary(self, node):
            # type: (Any) -> Any
            try:
                value = self.construct_scalar(node).encode("ascii")
            except UnicodeEncodeError as exc:
                raise ConstructorError(
                    None,
                    None,
                    "failed to convert base64 data into ascii: %s" % exc,
                    node.start_mark,
                )
            try:
                if hasattr(base64, "decodebytes"):
                    return base64.decodebytes(value)
                else:
                    return base64.decodestring(value)
            except binascii.Error as exc:
                raise ConstructorError(
                    None,
                    None,
                    "failed to decode base64 data: %s" % exc,
                    node.start_mark,

def construct_sequence(self, node, deep=False):
        # type: (Any, bool) -> Any
        """deep is True when creating an object/mapping recursively,
        in that case want the underlying elements available during construction
        """
        if not isinstance(node, SequenceNode):
            raise ConstructorError(
                None,
                None,
                "expected a sequence node, but found %s" % node.id,
                node.start_mark,
            )
        return [self.construct_object(child, deep=deep) for child in node.value]

def construct_scalar(self, node):
        # type: (Any) -> Any
        if not isinstance(node, ScalarNode):
            raise ConstructorError(
                None,
                None,
                "expected a scalar node, but found %s" % node.id,
                node.start_mark,
            )

        if node.style == "|" and isinstance(node.value, text_type):
            lss = LiteralScalarString(node.value, anchor=node.anchor)
            if node.comment and node.comment[1]:
                lss.comment = node.comment[1][0]  # type: ignore
            return lss
        if node.style == ">" and isinstance(node.value, text_type):
            fold_positions = []  # type: List[int]
            idx = -1
            while True:
                idx = node.value.find("\a", idx + 1)

def construct_setting(self, node, typ, deep=False):
        # type: (Any, Any, bool) -> Any
        if not isinstance(node, MappingNode):
            raise ConstructorError(
                None,
                None,
                "expected a mapping node, but found %s" % node.id,
                node.start_mark,
            )
        if node.comment:
            typ._yaml_add_comment(node.comment[:2])
            if len(node.comment) > 2:
                typ.yaml_end_comment_extend(node.comment[2], clear=True)
        if node.anchor:
            from .serializer import templated_id

            if not templated_id(node.anchor):
                typ.yaml_set_anchor(node.anchor)
        for key_node, value_node in node.value:
            # keys can be list -> deep

def construct_mapping(self, node, maptyp, deep=False):  # type: ignore
        # type: (Any, Any, bool) -> Any
        if not isinstance(node, MappingNode):
            raise ConstructorError(
                None,
                None,
                "expected a mapping node, but found %s" % node.id,
                node.start_mark,
            )
        merge_map = self.flatten_mapping(node)
        # mapping = {}
        if node.comment:
            maptyp._yaml_add_comment(node.comment[:2])
            if len(node.comment) > 2:
                maptyp.yaml_end_comment_extend(node.comment[2], clear=True)
        if node.anchor:
            from .serializer import templated_id

            if not templated_id(node.anchor):
                maptyp.yaml_set_anchor(node.anchor)

if not isinstance(subnode, MappingNode):
                            raise ConstructorError(
                                "while constructing a mapping",
                                node.start_mark,
                                "expected a mapping for merging, but found %s"
                                % subnode.id,
                                subnode.start_mark,
                            )
                        merge_map_list.append((index, constructed(subnode)))
                    #     self.flatten_mapping(subnode)
                    #     submerge.append(subnode.value)
                    # submerge.reverse()
                    # for value in submerge:
                    #     merge.extend(value)
                else:
                    raise ConstructorError(
                        "while constructing a mapping",
                        node.start_mark,
                        "expected a mapping or list of mappings for merging, "
                        "but found %s" % value_node.id,
                        value_node.start_mark,
                    )
            elif key_node.tag == u"tag:yaml.org,2002:value":
                key_node.tag = u"tag:yaml.org,2002:str"
                index += 1
            else:
                index += 1
        return merge_map_list
        # if merge:

elif key_node.flow_style is False:
                        key_m.fa.set_block_style()
                    key = key_m
            if PY2:
                try:
                    hash(key)
                except TypeError as exc:
                    raise ConstructorError(
                        "while constructing a mapping",
                        node.start_mark,
                        "found unacceptable key (%s)" % exc,
                        key_node.start_mark,
                    )
            else:
                if not isinstance(key, Hashable):
                    raise ConstructorError(
                        "while constructing a mapping",
                        node.start_mark,
                        "found unhashable key",
                        key_node.start_mark,
                    )
            value = self.construct_object(value_node, deep=deep)
            if self.check_mapping_key(node, key_node, maptyp, key, value):
                if (
                    key_node.comment
                    and len(key_node.comment) > 4
                    and key_node.comment[4]
                ):
                    if last_value is None:
                        key_node.comment[0] = key_node.comment.pop(4)
                        maptyp._yaml_add_comment(key_node.comment, value=last_key)
                    else:

def construct_rt_sequence(self, node, seqtyp, deep=False):
        # type: (Any, Any, bool) -> Any
        if not isinstance(node, SequenceNode):
            raise ConstructorError(
                None,
                None,
                "expected a sequence node, but found %s" % node.id,
                node.start_mark,
            )
        ret_val = []
        if node.comment:
            seqtyp._yaml_add_comment(node.comment[:2])
            if len(node.comment) > 2:
                seqtyp.yaml_end_comment_extend(node.comment[2], clear=True)
        if node.anchor:
            from .serializer import templated_id

            if not templated_id(node.anchor):
                seqtyp.yaml_set_anchor(node.anchor)
        for idx, child in enumerate(node.value):

from .serializer import templated_id

            if not templated_id(node.anchor):
                typ.yaml_set_anchor(node.anchor)
        for key_node, value_node in node.value:
            # keys can be list -> deep
            key = self.construct_object(key_node, deep=True)
            # lists are not hashable, but tuples are
            if not isinstance(key, Hashable):
                if isinstance(key, list):
                    key = tuple(key)
            if PY2:
                try:
                    hash(key)
                except TypeError as exc:
                    raise ConstructorError(
                        "while constructing a mapping",
                        node.start_mark,
                        "found unacceptable key (%s)" % exc,
                        key_node.start_mark,
                    )
            else:
                if not isinstance(key, Hashable):
                    raise ConstructorError(
                        "while constructing a mapping",
                        node.start_mark,
                        "found unhashable key",
                        key_node.start_mark,
                    )
            # construct but should be null
            value = self.construct_object(value_node, deep=deep)  # NOQA
            self.check_set_key(node, key_node, typ, key)