Python types.MemberDescriptorType方法代码示例

# 需要导入模块: import types [as 别名]
# 或者: from types import MemberDescriptorType [as 别名]
def ismemberdescriptor(object):
        """Return true if the object is a member descriptor.

        Member descriptors are specialized descriptors defined in extension
        modules."""
        return isinstance(object, types.MemberDescriptorType) 

# 需要导入模块: import types [as 别名]
# 或者: from types import MemberDescriptorType [as 别名]
def isNonPrimitiveInstance(x):
        return not isinstance(x,(float,int,type,tuple,list,dict,str,bytes,complex,bool,slice,_rl_NoneType,
            types.FunctionType,types.LambdaType,types.CodeType,
            types.MappingProxyType,types.SimpleNamespace,
            types.GeneratorType,types.MethodType,types.BuiltinFunctionType,
            types.BuiltinMethodType,types.ModuleType,types.TracebackType,
            types.FrameType,types.GetSetDescriptorType,types.MemberDescriptorType)) 

# 需要导入模块: import types [as 别名]
# 或者: from types import MemberDescriptorType [as 别名]
def get_class_slots(cls):
    """
    Return a list of all slots registered in class and parent classes.
    """
    slots = set()
    for sub in cls.mro():
        if sub is object:
            continue

        # Get slots from slots attribute
        cls_slots = sub.__dict__.get("__slots__")
        if isinstance(cls_slots, str):
            slots.add(cls_slots)
            continue
        elif isinstance(cls_slots, (tuple, list)):
            slots.update(slots)
            continue

        # Explicitly search for slot member objects
        else:
            members = []
            for k, v in sub.__dict__.items():
                if isinstance(v, MemberDescriptorType):
                    members.append(k)
            if members:
                slots.update(members)
            else:
                return None

    return tuple(slots) 

# 需要导入模块: import types [as 别名]
# 或者: from types import MemberDescriptorType [as 别名]
def test_slots_special2(self):
        # Testing __qualname__ and __classcell__ in __slots__
        class Meta(type):
            def __new__(cls, name, bases, namespace, attr):
                self.assertIn(attr, namespace)
                return super().__new__(cls, name, bases, namespace)

        class C1:
            def __init__(self):
                self.b = 42
        class C2(C1, metaclass=Meta, attr="__classcell__"):
            __slots__ = ["__classcell__"]
            def __init__(self):
                super().__init__()
        self.assertIsInstance(C2.__dict__["__classcell__"],
                              types.MemberDescriptorType)
        c = C2()
        self.assertEqual(c.b, 42)
        self.assertNotHasAttr(c, "__classcell__")
        c.__classcell__ = 42
        self.assertEqual(c.__classcell__, 42)
        with self.assertRaises(TypeError):
            class C3:
                __classcell__ = 42
                __slots__ = ["__classcell__"]

        class Q1(metaclass=Meta, attr="__qualname__"):
            __slots__ = ["__qualname__"]
        self.assertEqual(Q1.__qualname__, C1.__qualname__[:-2] + "Q1")
        self.assertIsInstance(Q1.__dict__["__qualname__"],
                              types.MemberDescriptorType)
        q = Q1()
        self.assertNotHasAttr(q, "__qualname__")
        q.__qualname__ = "q"
        self.assertEqual(q.__qualname__, "q")
        with self.assertRaises(TypeError):
            class Q2:
                __qualname__ = object()
                __slots__ = ["__qualname__"] 

# 需要导入模块: import types [as 别名]
# 或者: from types import MemberDescriptorType [as 别名]
def _is_unsupported_type(obj):
    return isinstance(obj, (types.ComplexType, types.TupleType, types.FunctionType, types.LambdaType,
                           types.GeneratorType, types.MethodType, types.UnboundMethodType, types.BuiltinFunctionType, types.BuiltinMethodType, types.FileType,
                           types.XRangeType, types.TracebackType, types.FrameType, types.DictProxyType, types.NotImplementedType, types.GetSetDescriptorType,
                           types.MemberDescriptorType)) 

# 需要导入模块: import types [as 别名]
# 或者: from types import MemberDescriptorType [as 别名]
def getattr_static(obj, attr, default=_sentinel):
    """Retrieve attributes without triggering dynamic lookup via the
       descriptor protocol,  __getattr__ or __getattribute__.

       Note: this function may not be able to retrieve all attributes
       that getattr can fetch (like dynamically created attributes)
       and may find attributes that getattr can't (like descriptors
       that raise AttributeError). It can also return descriptor objects
       instead of instance members in some cases. See the
       documentation for details.
    """
    instance_result = _sentinel
    if not _is_type(obj):
        klass = type(obj)
        dict_attr = _shadowed_dict(klass)
        if (dict_attr is _sentinel or
            type(dict_attr) is types.MemberDescriptorType):
            instance_result = _check_instance(obj, attr)
    else:
        klass = obj

    klass_result = _check_class(klass, attr)

    if instance_result is not _sentinel and klass_result is not _sentinel:
        if (_check_class(type(klass_result), '__get__') is not _sentinel and
            _check_class(type(klass_result), '__set__') is not _sentinel):
            return klass_result

    if instance_result is not _sentinel:
        return instance_result
    if klass_result is not _sentinel:
        return klass_result

    if obj is klass:
        # for types we check the metaclass too
        for entry in _static_getmro(type(klass)):
            if _shadowed_dict(type(entry)) is _sentinel:
                try:
                    return entry.__dict__[attr]
                except KeyError:
                    pass
    if default is not _sentinel:
        return default
    raise AttributeError(attr)


# ------------------------------------------------ generator introspection 

# 需要导入模块: import types [as 别名]
# 或者: from types import MemberDescriptorType [as 别名]
def _astroid_bootstrapping():
    """astroid bootstrapping the builtins module"""
    # this boot strapping is necessary since we need the Const nodes to
    # inspect_build builtins, and then we can proxy Const
    builder = InspectBuilder()
    astroid_builtin = builder.inspect_build(builtins)

    # pylint: disable=redefined-outer-name
    for cls, node_cls in node_classes.CONST_CLS.items():
        if cls is type(None):
            proxy = build_class("NoneType")
            proxy.parent = astroid_builtin
        elif cls is type(NotImplemented):
            proxy = build_class("NotImplementedType")
            proxy.parent = astroid_builtin
        else:
            proxy = astroid_builtin.getattr(cls.__name__)[0]
        if cls in (dict, list, set, tuple):
            node_cls._proxied = proxy
        else:
            _CONST_PROXY[cls] = proxy

    # Set the builtin module as parent for some builtins.
    nodes.Const._proxied = property(_set_proxied)

    _GeneratorType = nodes.ClassDef(
        types.GeneratorType.__name__, types.GeneratorType.__doc__
    )
    _GeneratorType.parent = astroid_builtin
    bases.Generator._proxied = _GeneratorType
    builder.object_build(bases.Generator._proxied, types.GeneratorType)

    if hasattr(types, "AsyncGeneratorType"):
        # pylint: disable=no-member; AsyncGeneratorType
        _AsyncGeneratorType = nodes.ClassDef(
            types.AsyncGeneratorType.__name__, types.AsyncGeneratorType.__doc__
        )
        _AsyncGeneratorType.parent = astroid_builtin
        bases.AsyncGenerator._proxied = _AsyncGeneratorType
        builder.object_build(bases.AsyncGenerator._proxied, types.AsyncGeneratorType)
    builtin_types = (
        types.GetSetDescriptorType,
        types.GeneratorType,
        types.MemberDescriptorType,
        type(None),
        type(NotImplemented),
        types.FunctionType,
        types.MethodType,
        types.BuiltinFunctionType,
        types.ModuleType,
        types.TracebackType,
    )
    for _type in builtin_types:
        if _type.__name__ not in astroid_builtin:
            cls = nodes.ClassDef(_type.__name__, _type.__doc__)
            cls.parent = astroid_builtin
            builder.object_build(cls, _type)
            astroid_builtin[_type.__name__] = cls