How to use the astroid.bases function in astroid

def _check_using_constant_test(self, node, test):
        const_nodes = (
            astroid.Module,
            astroid.scoped_nodes.GeneratorExp,
            astroid.Lambda,
            astroid.FunctionDef,
            astroid.ClassDef,
            astroid.bases.Generator,
            astroid.UnboundMethod,
            astroid.BoundMethod,
            astroid.Module,
        )
        structs = (astroid.Dict, astroid.Tuple, astroid.Set)

        # These nodes are excepted, since they are not constant
        # values, requiring a computation to happen.
        except_nodes = (
            astroid.Call,
            astroid.BinOp,
            astroid.BoolOp,
            astroid.UnaryOp,
            astroid.Subscript,
        )
        inferred = None

def _check_using_constant_test(self, node, test):
        const_nodes = (
            astroid.Module,
            astroid.scoped_nodes.GeneratorExp,
            astroid.Lambda, astroid.FunctionDef, astroid.ClassDef,
            astroid.bases.Generator, astroid.UnboundMethod,
            astroid.BoundMethod, astroid.Module)
        structs = (astroid.Dict, astroid.Tuple, astroid.Set)

        # These nodes are excepted, since they are not constant
        # values, requiring a computation to happen. The only type
        # of node in this list which doesn't have this property is
        # Getattr, which is excepted because the conditional statement
        # can be used to verify that the attribute was set inside a class,
        # which is definitely a valid use case.
        except_nodes = (astroid.Attribute, astroid.Call,
                        astroid.BinOp, astroid.BoolOp, astroid.UnaryOp,
                        astroid.Subscript)
        inferred = None
        emit = isinstance(test, (astroid.Const, ) + structs + const_nodes)
        if not isinstance(test, except_nodes):
            inferred = utils.safe_infer(test)

def delayed_assattr(self, node):
        """Visit a AssAttr node

        This adds name to locals and handle members definition.
        """
        try:
            frame = node.frame()
            for inferred in node.expr.infer():
                if inferred is util.YES:
                    continue
                try:
                    if inferred.__class__ is bases.Instance:
                        inferred = inferred._proxied
                        iattrs = inferred._instance_attrs
                    elif isinstance(inferred, bases.Instance):
                        # Const, Tuple, ... we may be wrong, may be not, but
                        # anyway we don't want to pollute builtin's namespace
                        continue
                    elif inferred.is_function:
                        iattrs = inferred._instance_attrs
                    else:
                        iattrs = inferred._locals
                except AttributeError:
                    # XXX log error
                    continue
                values = iattrs.setdefault(node.attrname, [])
                if node in values:
                    continue
                # get assign in __init__ first XXX useful ?
                if (frame.name == '__init__' and values and
                        not values[0].frame().name == '__init__'):

kwargs = []
        if isinstance(node.func, astroid.Attribute) and node.func.attrname == "sort":
            inferred = utils.safe_infer(node.func.expr)
            if not inferred:
                return

            builtins_list = "{}.list".format(bases.BUILTINS)
            if isinstance(inferred, astroid.List) or inferred.qname() == builtins_list:
                kwargs = node.keywords

        elif isinstance(node.func, astroid.Name) and node.func.name == "sorted":
            inferred = utils.safe_infer(node.func)
            if not inferred:
                return

            builtins_sorted = "{}.sorted".format(bases.BUILTINS)
            if inferred.qname() == builtins_sorted:
                kwargs = node.keywords

        for kwarg in kwargs or []:
            if kwarg.arg == "cmp":
                self.add_message("using-cmp-argument", node=node)
                return

def _arguments_infer_argname(self, name, context):
    # arguments information may be missing, in which case we can't do anything
    # more
    if not (self.arguments or self.vararg or self.kwarg):
        yield util.Uninferable
        return
    # first argument of instance/class method
    if self.arguments and getattr(self.arguments[0], "name", None) == name:
        functype = self.parent.type
        cls = self.parent.parent.scope()
        is_metaclass = isinstance(cls, nodes.ClassDef) and cls.type == "metaclass"
        # If this is a metaclass, then the first argument will always
        # be the class, not an instance.
        if context.boundnode and isinstance(context.boundnode, bases.Instance):
            cls = context.boundnode._proxied
        if is_metaclass or functype == "classmethod":
            yield cls
            return
        if functype == "method":
            yield cls.instantiate_class()
            return

    if context and context.callcontext:
        call_site = arguments.CallSite(context.callcontext, context.extra_context)
        yield from call_site.infer_argument(self.parent, name, context)
        return

    if name == self.vararg:
        vararg = nodes.const_factory(())
        vararg.parent = self

def attr_mro(self):
        if not self._instance.newstyle:
            raise exceptions.AttributeInferenceError(
                target=self._instance, attribute="mro"
            )

        # pylint: disable=import-outside-toplevel; circular import
        from astroid import bases

        other_self = self

        # Cls.mro is a method and we need to return one in order to have a proper inference.
        # The method we're returning is capable of inferring the underlying MRO though.
        class MroBoundMethod(bases.BoundMethod):
            def infer_call_result(self, caller, context=None):
                yield other_self.attr___mro__

        implicit_metaclass = self._instance.implicit_metaclass()
        mro_method = implicit_metaclass.locals["mro"][0]
        return MroBoundMethod(proxy=mro_method, bound=implicit_metaclass)

def infer_name(self, context=None):
    """infer a Name: use name lookup rules"""
    frame, stmts = self.lookup(self.name)
    if not stmts:
        # Try to see if the name is enclosed in a nested function
        # and use the higher (first function) scope for searching.
        # TODO: should this be promoted to other nodes as well?
        parent_function = _higher_function_scope(self.scope())
        if parent_function:
            _, stmts = parent_function.lookup(self.name)

        if not stmts:
            raise exceptions.UnresolvableName(self.name)
    context = context.clone()
    context.lookupname = self.name
    return bases._infer_stmts(stmts, context, frame)
nodes.Name._infer = bases.path_wrapper(infer_name)

def _object_type(node, context=None):
    astroid_manager = manager.AstroidManager()
    builtins = astroid_manager.builtins_module
    context = context or contextmod.InferenceContext()

    for inferred in node.infer(context=context):
        if isinstance(inferred, scoped_nodes.ClassDef):
            if inferred.newstyle:
                metaclass = inferred.metaclass(context=context)
                if metaclass:
                    yield metaclass
                    continue
            yield builtins.getattr("type")[0]
        elif isinstance(inferred, (scoped_nodes.Lambda, bases.UnboundMethod)):
            yield _function_type(inferred, builtins)
        elif isinstance(inferred, scoped_nodes.Module):
            yield _build_proxy_class("module", builtins)
        else:
            yield inferred._proxied

def py__get__(self):
        from astroid import bases

        func = self._instance

        class DescriptorBoundMethod(bases.BoundMethod):
            """Bound method which knows how to understand calling descriptor binding."""

            def implicit_parameters(self):
                # Different than BoundMethod since the signature
                # is different.
                return 0

            def infer_call_result(self, caller, context=None, context_lookup=None):
                if len(caller.args) != 2:
                    raise exceptions.InferenceError(
                        "Invalid arguments for descriptor binding",
                        target=self, context=context)

                context = contextmod.copy_context(context)
                cls = next(caller.args[0].infer(context=context))