Namespace.no_blocker() - Code Metrics - Inspection of "Move top-level function into class." - mwchase/class-namespaces - Measure and Improve Code Quality continuously with Scrutinizer

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by Max

created 2016-11-21 05:41 UTC

Namespace.no_blocker() A

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Lines	0
Ratio	0 %

Code Coverage

Tests	10
CRAP Score	4

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	4
c	1
b	0
f	0
dl	0
loc	12
ccs	10
cts	10
cp	1
crap	4
rs	9.2

"""Class Namespaces (internal module).

All of the guts of the class namespace implementation.

"""


# See https://blog.ionelmc.ro/2015/02/09/understanding-python-metaclasses/

import collections.abc
import functools
import itertools
import weakref

from .descriptor_inspector import _DescriptorInspector
from .flags import ENABLE_SET_NAME


_PROXY_INFOS = weakref.WeakKeyDictionary()


def _is_namespaceable(cls):
    """Partial function for filter."""
    return isinstance(cls, Namespaceable)


def _has_namespace_at(path, cls):
    """Return whether there is a namespace for cls at the given path."""
    return Namespace.namespace_exists(cls, path)


def _mro_to_chained(mro, dct):
    """Return a chained map of lookups for the given namespace and mro."""
    return collections.ChainMap(*[
        Namespace.get_namespace(cls, dct.path) for cls in
        filter(
            functools.partial(_has_namespace_at, dct.path),
            itertools.takewhile(
                functools.partial(Namespace.no_blocker, dct),
                filter(_is_namespaceable, mro)))])


def _instance_map(ns_proxy):
    """Return a map, possibly chained, of lookups for the given instance."""
    dct, instance, _ = _PROXY_INFOS[ns_proxy]
    if instance is not None:
        if isinstance(instance, Namespaceable):
            return _mro_to_chained(instance.__mro__, dct)
        else:
            return Namespace.get_namespace(instance, dct.path)
    else:
        return {}


def _mro_map(ns_proxy):
    """Return a chained map of lookups for the given owner class."""
    dct, _, owner = _PROXY_INFOS[ns_proxy]
    mro = owner.__mro__
    mro = mro[mro.index(dct.parent_object):]
    return _mro_to_chained(mro, dct)


def _retarget(ns_proxy):
    """Convert a class lookup to an instance lookup, if needed."""
    dct, instance, owner = _PROXY_INFOS[ns_proxy]
    if instance is None and isinstance(type(owner), Namespaceable):
        instance, owner = owner, type(owner)
        dct = Namespace.get_namespace(owner, dct.path)
        ns_proxy = _NamespaceProxy(dct, instance, owner)
    return ns_proxy


def _get(a_map, name):
    """Return a _DescriptorInspector around the attribute, or None."""
    try:
        value = a_map[name]
    except KeyError:
        return None
    else:
        return _DescriptorInspector(value)


def _delete(dct, name):
    """Attempt to delete `name` from `dct`. Raise AttributeError if missing."""
    try:
        del dct[name]
    except KeyError:
        raise AttributeError(name)


def _has_get(value):
    """Return whether the value is a wrapped getter descriptor."""
    return value is not None and value.has_get


def _is_data(value):
    """Return whether the value is a wrapped data descriptor."""
    return value is not None and value.is_data


def _get_data(dct, name):
    """Return the data descriptor associated with `name` in `dct`, if any."""
    value = _get(dct, name)
    if _is_data(value):
        return value


class _NamespaceProxy:

    """Proxy object for manipulating and querying namespaces."""

    __slots__ = '__weakref__',

    def __init__(self, dct, instance, owner):
        _PROXY_INFOS[self] = dct, instance, owner

    def __dir__(self):
        return collections.ChainMap(_instance_map(self), _mro_map(self))

    def __getattribute__(self, name):
        self = _retarget(self)
        dct, instance, owner = _PROXY_INFOS[self]
        if owner is None:
            return dct[name]
        instance_map = _instance_map(self)
        mro_map = _mro_map(self)
        instance_value = _get(instance_map, name)
        mro_value = _get(mro_map, name)
        if _is_data(mro_value):
            return mro_value.get(instance, owner)
        elif issubclass(owner, type) and _has_get(instance_value):
            return instance_value.get(None, instance)
        elif instance_value is not None:
            return instance_value.object
        elif _has_get(mro_value):
            return mro_value.get(instance, owner)
        elif mro_value is not None:
            return mro_value.object
        else:
            raise AttributeError(name)

    def __setattr__(self, name, value):
        self = _retarget(self)
        dct, instance, owner = _PROXY_INFOS[self]
        if owner is None:
            dct[name] = value
            return
        if instance is None:
            real_map = Namespace.get_namespace(owner, dct.path)
            real_map[name] = value
            return
        mro_map = _mro_map(self)
        target_value = _get_data(mro_map, name)
        if target_value is not None:
            target_value.set(instance, value)
            return
        instance_map = Namespace.get_namespace(instance, dct.path)
        instance_map[name] = value

    def __delattr__(self, name):
        self = _retarget(self)
        dct, instance, owner = _PROXY_INFOS[self]
        if owner is None:
            _delete(dct, name)
            return
        real_map = Namespace.get_namespace(owner, dct.path)
        if instance is None:
            _delete(real_map, name)
            return
        value = _get_data(real_map, name)
        if value is not None:
            value.delete(instance)
            return
        instance_map = Namespace.get_namespace(instance, dct.path)
        _delete(instance_map, name)

    def __enter__(self):
        dct, _, _ = _PROXY_INFOS[self]
        return dct.__enter__()

    def __exit__(self, exc_type, exc_value, traceback):
        dct, _, _ = _PROXY_INFOS[self]
        return dct.__exit__(exc_type, exc_value, traceback)


class Namespace(dict):

    """Namespace."""

    __slots__ = 'name', 'scope', 'parent', 'active', 'parent_object'

    __namespaces = {}

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        bad_values = tuple(
            value for value in self.values() if
            isinstance(value, (Namespace, _NamespaceProxy)))
        if bad_values:
            raise ValueError('Bad values: {}'.format(bad_values))
        self.name = None
        self.scope = None
        self.parent = None
        self.active = False
        self.parent_object = None

    @classmethod
    def premake(cls, name, parent):
        """Return an empty namespace with the given name and parent."""
        self = cls()
        self.name = name
        self.parent = parent
        return self

    def __setitem__(self, key, value):
        if (
                self.parent_object is not None and
                isinstance(value, Namespace) and value.name != key):
            value.push(key, self.scope)
            value.add(self.parent_object)
        super().__setitem__(key, value)

    def __enter__(self):
        self.activate()
        return self

    def __exit__(self, exc_type, exc_value, traceback):
        if self.name is None:
            raise RuntimeError('Namespace must be named.')
        self.deactivate()

    @property
    def path(self):
        """Return the full path of the namespace."""
        if self.name is None or self.parent is None:
            raise ValueError
        if isinstance(self.parent, Namespace):
            parent_path = self.parent.path
        else:
            parent_path = ()
        return parent_path + (self.name,)

    @classmethod
    def __get_helper(cls, target, path):
        """Return the namespace for `target` at `path`, create if needed."""
        if isinstance(target, Namespaceable):
            path_ = target, path
            namespaces = cls.__namespaces
        else:
            path_ = path
            try:
                namespaces = target.__namespaces
            except AttributeError:
                namespaces = {}
                target.__namespaces = namespaces
        return path_, namespaces

    @classmethod
    def namespace_exists(cls, target, path):
        """Return whether the given namespace exists."""
        path_, namespaces = cls.__get_helper(target, path)
        return path_ in namespaces

    @classmethod
    def get_namespace(cls, target, path):
        """Return a namespace with given target and path, create if needed."""
        path_, namespaces = cls.__get_helper(target, path)
        try:
            return namespaces[path_]
        except KeyError:
            if len(path) == 1:
                parent = {}
            else:
                parent = cls.get_namespace(target, path[:-1])
            return namespaces.setdefault(path_, cls.premake(path[-1], parent))

    @classmethod
    def no_blocker(cls, dct, cls_):
        """Return False if there's a non-Namespace object in the path."""
        try:
            namespace = vars(cls_)
            for name in dct.path:
                namespace = namespace[name]
                if not isinstance(namespace, cls):
                    return False
        except KeyError:
try:
    raises_exception()
except:  # Could be removed
    pass
            pass
        return True

    def add(self, target):
        """Add self as a namespace under target."""
        path, namespaces = self.__get_helper(target, self.path)
        res = namespaces.setdefault(path, self)
        if res is self:
            self.parent_object = target

    def set_if_none(self, name, value):
        """Set the attribute `name` to `value`, if it's initially None."""
        if getattr(self, name) is None:
            setattr(self, name, value)

    def push(self, name, scope):
        """Bind self to the given name and scope, and activate."""
        self.set_if_none('name', name)
        self.set_if_none('scope', scope)
        self.set_if_none('parent', scope.dicts[0])
        if name != self.name:
            raise ValueError('Cannot rename namespace')
        if scope is not self.scope:
            raise ValueError('Cannot reuse namespace')
        if scope.dicts[0] is not self.parent:
            raise ValueError('Cannot reparent namespace')
        self.scope.namespaces.append(self)
        self.activate()

    def activate(self):
        """Take over as the scope for the target."""
        if self.scope is not None and not self.active:
            if self.scope.dicts[0] is not self.parent:
                raise ValueError('Cannot reparent namespace')
            self.active = True
            self.scope.dicts.insert(0, self)

    def deactivate(self):
        """Stop being the scope for the target."""
        if self.scope is not None and self.active:
            self.active = False
            self.scope.dicts.pop(0)

    def __get__(self, instance, owner):
        return _NamespaceProxy(self, instance, owner)


class _NamespaceScope(collections.abc.MutableMapping):

    """The class creation namespace for Namespaceables."""

    __slots__ = 'dicts', 'namespaces'

    def __init__(self, dct):
        self.dicts = [dct]
        self.namespaces = []

    def __getitem__(self, key):
        value = collections.ChainMap(*self.dicts)[key]
        if isinstance(value, Namespace):
            value = _NamespaceProxy(value, None, None)
        return value

    def __setitem__(self, key, value):
        dct = self.dicts[0]
        if isinstance(value, _NamespaceProxy):
            value, _, _ = _PROXY_INFOS[value]
        if isinstance(value, Namespace) and value.name != key:
            value.push(key, self)
        dct[key] = value

    def __delitem__(self, key):
        del self.dicts[0][key]

    def __iter__(self):
        return iter(collections.ChainMap(*self.dicts))

    def __len__(self):
        return len(collections.ChainMap(*self.dicts))


_NAMESPACE_SCOPES = weakref.WeakKeyDictionary()


class Namespaceable(type):

    """Metaclass for classes that can contain namespaces."""

    @classmethod
    def __prepare__(mcs, name, bases, **kwargs):
        return _NamespaceScope(super().__prepare__(name, bases, **kwargs))

    def __new__(mcs, name, bases, dct, **kwargs):
        cls = super().__new__(mcs, name, bases, dct.dicts[0], **kwargs)
        _NAMESPACE_SCOPES[cls] = dct
        for namespace in dct.namespaces:
            namespace.add(cls)
            if ENABLE_SET_NAME:
                for name, value in namespace.items():
                    wrapped = _DescriptorInspector(value)
                    if wrapped.has_set_name:
                        wrapped.set_name(cls, name)
        return cls

    def __setattr__(cls, name, value):
        if isinstance(value, Namespace) and value.name != name:
            value.push(name, _NAMESPACE_SCOPES[cls])
            value.add(cls)
        if issubclass(cls, Namespaceable):
            super().__setattr__(cls, name, value)
        else:
            super().__setattr__(name, value)


1		"""Class Namespaces (internal module).
2
3		All of the guts of the class namespace implementation.
4
5		"""
6
7
8		# See https://blog.ionelmc.ro/2015/02/09/understanding-python-metaclasses/
9
10	6	import collections.abc
11	6	import functools
12	6	import itertools
13	6	import weakref
14
15	6	from .descriptor_inspector import _DescriptorInspector
16	6	from .flags import ENABLE_SET_NAME
17
18
19	6	_PROXY_INFOS = weakref.WeakKeyDictionary()
20
21
22	6	def _is_namespaceable(cls):
23		"""Partial function for filter."""
24	6	return isinstance(cls, Namespaceable)
25
26
27	6	def _has_namespace_at(path, cls):
28		"""Return whether there is a namespace for cls at the given path."""
29	6	return Namespace.namespace_exists(cls, path)
30
31
32	6	def _mro_to_chained(mro, dct):
33		"""Return a chained map of lookups for the given namespace and mro."""
34	6	return collections.ChainMap(*[
35		Namespace.get_namespace(cls, dct.path) for cls in
36		filter(
37		functools.partial(_has_namespace_at, dct.path),
38		itertools.takewhile(
39		functools.partial(Namespace.no_blocker, dct),
40		filter(_is_namespaceable, mro)))])
41
42
43	6	def _instance_map(ns_proxy):
44		"""Return a map, possibly chained, of lookups for the given instance."""
45	6	dct, instance, _ = _PROXY_INFOS[ns_proxy]
46	6	if instance is not None:
47	6	if isinstance(instance, Namespaceable):
48	6	return _mro_to_chained(instance.__mro__, dct)
49		else:
50	6	return Namespace.get_namespace(instance, dct.path)
51		else:
52	6	return {}
53
54
55	6	def _mro_map(ns_proxy):
56		"""Return a chained map of lookups for the given owner class."""
57	6	dct, _, owner = _PROXY_INFOS[ns_proxy]
58	6	mro = owner.__mro__
59	6	mro = mro[mro.index(dct.parent_object):]
60	6	return _mro_to_chained(mro, dct)
61
62
63	6	def _retarget(ns_proxy):
64		"""Convert a class lookup to an instance lookup, if needed."""
65	6	dct, instance, owner = _PROXY_INFOS[ns_proxy]
66	6	if instance is None and isinstance(type(owner), Namespaceable):
67	6	instance, owner = owner, type(owner)
68	6	dct = Namespace.get_namespace(owner, dct.path)
69	6	ns_proxy = _NamespaceProxy(dct, instance, owner)
70	6	return ns_proxy
71
72
73	6	def _get(a_map, name):
74		"""Return a _DescriptorInspector around the attribute, or None."""
75	6	try:
76	6	value = a_map[name]
77	6	except KeyError:
78	6	return None
79		else:
80	6	return _DescriptorInspector(value)
81
82
83	6	def _delete(dct, name):
84		"""Attempt to delete `name` from `dct`. Raise AttributeError if missing."""
85	6	try:
86	6	del dct[name]
87	6	except KeyError:
88	6	raise AttributeError(name)
89
90
91	6	def _has_get(value):
92		"""Return whether the value is a wrapped getter descriptor."""
93	6	return value is not None and value.has_get
94
95
96	6	def _is_data(value):
97		"""Return whether the value is a wrapped data descriptor."""
98	6	return value is not None and value.is_data
99
100
101	6	def _get_data(dct, name):
102		"""Return the data descriptor associated with `name` in `dct`, if any."""
103	6	value = _get(dct, name)
104	6	if _is_data(value):
105		return value
106
107
108	6	class _NamespaceProxy:
109
110		"""Proxy object for manipulating and querying namespaces."""
111
112	6	__slots__ = '__weakref__',
113
114	6	def __init__(self, dct, instance, owner):
115	6	_PROXY_INFOS[self] = dct, instance, owner
116
117	6	def __dir__(self):
118	6	return collections.ChainMap(_instance_map(self), _mro_map(self))
119
120	6	def __getattribute__(self, name):
121	6	self = _retarget(self)
122	6	dct, instance, owner = _PROXY_INFOS[self]
123	6	if owner is None:
124	6	return dct[name]
125	6	instance_map = _instance_map(self)
126	6	mro_map = _mro_map(self)
127	6	instance_value = _get(instance_map, name)
128	6	mro_value = _get(mro_map, name)
129	6	if _is_data(mro_value):
130	6	return mro_value.get(instance, owner)
131	6	elif issubclass(owner, type) and _has_get(instance_value):
132	6	return instance_value.get(None, instance)
133	6	elif instance_value is not None:
134	6	return instance_value.object
135	6	elif _has_get(mro_value):
136	6	return mro_value.get(instance, owner)
137	6	elif mro_value is not None:
138	6	return mro_value.object
139		else:
140	6	raise AttributeError(name)
141
142	6	def __setattr__(self, name, value):
143	6	self = _retarget(self)
144	6	dct, instance, owner = _PROXY_INFOS[self]
145	6	if owner is None:
146	6	dct[name] = value
147	6	return
148	6	if instance is None:
149	6	real_map = Namespace.get_namespace(owner, dct.path)
150	6	real_map[name] = value
151	6	return
152	6	mro_map = _mro_map(self)
153	6	target_value = _get_data(mro_map, name)
154	6	if target_value is not None:
155		target_value.set(instance, value)
156		return
157	6	instance_map = Namespace.get_namespace(instance, dct.path)
158	6	instance_map[name] = value
159
160	6	def __delattr__(self, name):
161	6	self = _retarget(self)
162	6	dct, instance, owner = _PROXY_INFOS[self]
163	6	if owner is None:
164	6	_delete(dct, name)
165	6	return
166	6	real_map = Namespace.get_namespace(owner, dct.path)
167	6	if instance is None:
168	6	_delete(real_map, name)
169	6	return
170	6	value = _get_data(real_map, name)
171	6	if value is not None:
172		value.delete(instance)
173		return
174	6	instance_map = Namespace.get_namespace(instance, dct.path)
175	6	_delete(instance_map, name)
176
177	6	def __enter__(self):
178	6	dct, _, _ = _PROXY_INFOS[self]
179	6	return dct.__enter__()
180
181	6	def __exit__(self, exc_type, exc_value, traceback):
182	6	dct, _, _ = _PROXY_INFOS[self]
183	6	return dct.__exit__(exc_type, exc_value, traceback)
184
185
186	6	class Namespace(dict):
187
188		"""Namespace."""
189
190	6	__slots__ = 'name', 'scope', 'parent', 'active', 'parent_object'
191
192	6	__namespaces = {}
193
194	6	def __init__(self, args, *kwargs):
195	6	super().__init__(args, *kwargs)
196	6	bad_values = tuple(
197		value for value in self.values() if
198		isinstance(value, (Namespace, _NamespaceProxy)))
199	6	if bad_values:
200	6	raise ValueError('Bad values: {}'.format(bad_values))
201	6	self.name = None
202	6	self.scope = None
203	6	self.parent = None
204	6	self.active = False
205	6	self.parent_object = None
206
207	6	@classmethod
208		def premake(cls, name, parent):
209		"""Return an empty namespace with the given name and parent."""
210	6	self = cls()
211	6	self.name = name
212	6	self.parent = parent
213	6	return self
214
215	6	def __setitem__(self, key, value):
216	6	if (
217		self.parent_object is not None and
218		isinstance(value, Namespace) and value.name != key):
219	6	value.push(key, self.scope)
220	6	value.add(self.parent_object)
221	6	super().__setitem__(key, value)
222
223	6	def __enter__(self):
224	6	self.activate()
225	6	return self
226
227	6	def __exit__(self, exc_type, exc_value, traceback):
228	6	if self.name is None:
229	6	raise RuntimeError('Namespace must be named.')
230	6	self.deactivate()
231
232	6	@property
233		def path(self):
234		"""Return the full path of the namespace."""
235	6	if self.name is None or self.parent is None:
236		raise ValueError
237	6	if isinstance(self.parent, Namespace):
238	6	parent_path = self.parent.path
239		else:
240	6	parent_path = ()
241	6	return parent_path + (self.name,)
242
243	6	@classmethod
244		def __get_helper(cls, target, path):
245		"""Return the namespace for `target` at `path`, create if needed."""
246	6	if isinstance(target, Namespaceable):
247	6	path_ = target, path
248	6	namespaces = cls.__namespaces
249		else:
250	6	path_ = path
251	6	try:
252	6	namespaces = target.__namespaces
253	6	except AttributeError:
254	6	namespaces = {}
255	6	target.__namespaces = namespaces
256	6	return path_, namespaces
257
258	6	@classmethod
259		def namespace_exists(cls, target, path):
260		"""Return whether the given namespace exists."""
261	6	path_, namespaces = cls.__get_helper(target, path)
262	6	return path_ in namespaces
263
264	6	@classmethod
265		def get_namespace(cls, target, path):
266		"""Return a namespace with given target and path, create if needed."""
267	6	path_, namespaces = cls.__get_helper(target, path)
268	6	try:
269	6	return namespaces[path_]
270	6	except KeyError:
271	6	if len(path) == 1:
272	6	parent = {}
273		else:
274	6	parent = cls.get_namespace(target, path[:-1])
275	6	return namespaces.setdefault(path_, cls.premake(path[-1], parent))
276
277	6	@classmethod
278		def no_blocker(cls, dct, cls_):
279		"""Return False if there's a non-Namespace object in the path."""
280	6	try:
281	6	namespace = vars(cls_)
282	6	for name in dct.path:
283	6	namespace = namespace[name]
284	6	if not isinstance(namespace, cls):
285	6	return False
286	6	except KeyError:
		1 ignored issue – show Unused Code introduced 2016-11-20 03:53 UTC by Report Bug Copy Issue Report This except handler seems to be unused and could be removed. Except handlers which only contain `pass` and do not have an `else` clause can usually simply be removed: try: raises_exception() except: # Could be removed pass Loading history...
287	6	pass
288	6	return True
289
290	6	def add(self, target):
291		"""Add self as a namespace under target."""
292	6	path, namespaces = self.__get_helper(target, self.path)
293	6	res = namespaces.setdefault(path, self)
294	6	if res is self:
295	6	self.parent_object = target
296
297	6	def set_if_none(self, name, value):
298		"""Set the attribute `name` to `value`, if it's initially None."""
299	6	if getattr(self, name) is None:
300	6	setattr(self, name, value)
301
302	6	def push(self, name, scope):
303		"""Bind self to the given name and scope, and activate."""
304	6	self.set_if_none('name', name)
305	6	self.set_if_none('scope', scope)
306	6	self.set_if_none('parent', scope.dicts[0])
307	6	if name != self.name:
308	6	raise ValueError('Cannot rename namespace')
309	6	if scope is not self.scope:
310		raise ValueError('Cannot reuse namespace')
311	6	if scope.dicts[0] is not self.parent:
312		raise ValueError('Cannot reparent namespace')
313	6	self.scope.namespaces.append(self)
314	6	self.activate()
315
316	6	def activate(self):
317		"""Take over as the scope for the target."""
318	6	if self.scope is not None and not self.active:
319	6	if self.scope.dicts[0] is not self.parent:
320		raise ValueError('Cannot reparent namespace')
321	6	self.active = True
322	6	self.scope.dicts.insert(0, self)
323
324	6	def deactivate(self):
325		"""Stop being the scope for the target."""
326	6	if self.scope is not None and self.active:
327	6	self.active = False
328	6	self.scope.dicts.pop(0)
329
330	6	def __get__(self, instance, owner):
331	6	return _NamespaceProxy(self, instance, owner)
332
333
334	6	class _NamespaceScope(collections.abc.MutableMapping):
335
336		"""The class creation namespace for Namespaceables."""
337
338	6	__slots__ = 'dicts', 'namespaces'
339
340	6	def __init__(self, dct):
341	6	self.dicts = [dct]
342	6	self.namespaces = []
343
344	6	def __getitem__(self, key):
345	6	value = collections.ChainMap(*self.dicts)[key]
346	6	if isinstance(value, Namespace):
347	6	value = _NamespaceProxy(value, None, None)
348	6	return value
349
350	6	def __setitem__(self, key, value):
351	6	dct = self.dicts[0]
352	6	if isinstance(value, _NamespaceProxy):
353	6	value, _, _ = _PROXY_INFOS[value]
354	6	if isinstance(value, Namespace) and value.name != key:
355	6	value.push(key, self)
356	6	dct[key] = value
357
358	6	def __delitem__(self, key):
359	6	del self.dicts[0][key]
360
361	6	def __iter__(self):
362		return iter(collections.ChainMap(*self.dicts))
363
364	6	def __len__(self):
365		return len(collections.ChainMap(*self.dicts))
366
367
368	6	_NAMESPACE_SCOPES = weakref.WeakKeyDictionary()
369
370
371	6	class Namespaceable(type):
372
373		"""Metaclass for classes that can contain namespaces."""
374
375	6	@classmethod
376		def __prepare__(mcs, name, bases, **kwargs):
377	6	return _NamespaceScope(super().__prepare__(name, bases, **kwargs))
378
379	6	def __new__(mcs, name, bases, dct, **kwargs):
380	6	cls = super().__new__(mcs, name, bases, dct.dicts[0], **kwargs)
381	6	_NAMESPACE_SCOPES[cls] = dct
382	6	for namespace in dct.namespaces:
383	6	namespace.add(cls)
384	6	if ENABLE_SET_NAME:
385	2	for name, value in namespace.items():
386	2	wrapped = _DescriptorInspector(value)
387	2	if wrapped.has_set_name:
388	2	wrapped.set_name(cls, name)
389	6	return cls
390
391	6	def __setattr__(cls, name, value):
392	6	if isinstance(value, Namespace) and value.name != name:
393	6	value.push(name, _NAMESPACE_SCOPES[cls])
394	6	value.add(cls)
395	6	if issubclass(cls, Namespaceable):
396	6	super().__setattr__(cls, name, value)
397		else:
398		super().__setattr__(name, value)
399

mwchase / class-namespaces

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