Python weakref.WeakValueDictionary() Examples

def insert(self, index, value):
        assert self.ref_classdef.isinstance(value.classdef)

        self.references.insert(index, self.next_free_key)

        objects = {}
        objects[index] = value
        # increment all cached object with > indices +1
        for key, value in self.objects.items():
            if key >= index:
                objects[key+1] = value
            else:
                objects[key] = value

        self.next_free_key += 1
        if self.attached:
            self.objects = weakref.WeakValueDictionary(objects)
        else:
            self.objects = objects
        self.attach() 

def __init__(self, parent, pid, format, version=PROPERTY_VERSION):
        super(StrongRefSetProperty, self).__init__(parent, pid, format, version)

        self.references = {}

        self.index_name = None

        self.next_free_key = 0
        self.last_free_key = 0xFFFFFFFF

        # Pid of the referenced objects unique_key
        self.key_pid = None
        self.key_size = None

        if self.attached:
            self.objects = weakref.WeakValueDictionary()
        else:
            self.objects = {} 

def test_deepcopy_weakvaluedict(self):
        class C(object):
            def __init__(self, i):
                self.i = i
        a, b, c, d = [C(i) for i in xrange(4)]
        u = weakref.WeakValueDictionary()
        u[a] = b
        u[c] = d
        # Keys are copied, values aren't
        v = copy.deepcopy(u)
        self.assertNotEqual(v, u)
        self.assertEqual(len(v), 2)
        (x, y), (z, t) = sorted(v.items(), key=lambda pair: pair[0].i)
        self.assertFalse(x is a)
        self.assertEqual(x.i, a.i)
        self.assertTrue(y is b)
        self.assertFalse(z is c)
        self.assertEqual(z.i, c.i)
        self.assertTrue(t is d)
        del x, y, z, t
        del d
        self.assertEqual(len(v), 1) 

def __init__(self, shorthand_name=None):
        """
        Creates a new :class:`TransformNode`.

        **shorthand_name** - a string representing the "name" of this
                             transform. The name carries no significance
                             other than to improve the readability of
                             ``str(transform)`` when DEBUG=True.
        """
        # Parents are stored in a WeakValueDictionary, so that if the
        # parents are deleted, references from the children won't keep
        # them alive.
        self._parents = WeakValueDictionary()

        # TransformNodes start out as invalid until their values are
        # computed for the first time.
        self._invalid = 1
        self._shorthand_name = shorthand_name or '' 

def clear(self):
        self.user = None
        self._users = weakref.WeakValueDictionary()
        self._emojis = {}
        self._calls = {}
        self._guilds = {}
        self._voice_clients = {}

        # LRU of max size 128
        self._private_channels = OrderedDict()
        # extra dict to look up private channels by user id
        self._private_channels_by_user = {}
        self._messages = self.max_messages and deque(maxlen=self.max_messages)

        # In cases of large deallocations the GC should be called explicitly
        # To free the memory more immediately, especially true when it comes
        # to reconnect loops which cause mass allocations and deallocations.
        gc.collect() 

def test_weak_valued_dict_update(self):
        self.check_update(weakref.WeakValueDictionary,
                          {1: C(), 'a': C(), C(): C()})
        # errors
        self.assertRaises(TypeError, weakref.WeakValueDictionary.update)
        d = weakref.WeakValueDictionary()
        self.assertRaises(TypeError, d.update, {}, {})
        self.assertRaises(TypeError, d.update, (), ())
        self.assertEqual(list(d.keys()), [])
        # special keyword arguments
        o = Object(3)
        for kw in 'self', 'dict', 'other', 'iterable':
            d = weakref.WeakValueDictionary()
            d.update(**{kw: o})
            self.assertEqual(list(d.keys()), [kw])
            self.assertEqual(d[kw], o) 

def __init__(self, moveEvent, acceptable):
        self.enter = False
        self.acceptable = acceptable
        self.exit = False
        self.__clickItems = weakref.WeakValueDictionary()
        self.__dragItems = weakref.WeakValueDictionary()
        self.currentItem = None
        if moveEvent is not None:
            self._scenePos = moveEvent.scenePos()
            self._screenPos = moveEvent.screenPos()
            self._lastScenePos = moveEvent.lastScenePos()
            self._lastScreenPos = moveEvent.lastScreenPos()
            self._buttons = moveEvent.buttons()
            self._modifiers = moveEvent.modifiers()
        else:
            self.exit = True 

def global_cache(srctype, ffi, funcname, *args, **kwds):
    key = kwds.pop('key', (funcname, args))
    assert not kwds
    try:
        return ffi._typecache[key]
    except KeyError:
        pass
    try:
        res = getattr(ffi._backend, funcname)(*args)
    except NotImplementedError as e:
        raise NotImplementedError("%s: %r: %s" % (funcname, srctype, e))
    # note that setdefault() on WeakValueDictionary is not atomic
    # and contains a rare bug (http://bugs.python.org/issue19542);
    # we have to use a lock and do it ourselves
    cache = ffi._typecache
    with global_lock:
        res1 = cache.get(key)
        if res1 is None:
            cache[key] = res
            return res
        else:
            return res1 

def __init__(self, shorthand_name=None):
        """
        Creates a new :class:`TransformNode`.

        **shorthand_name** - a string representing the "name" of this
                             transform. The name carries no significance
                             other than to improve the readability of
                             ``str(transform)`` when DEBUG=True.
        """
        # Parents are stored in a WeakValueDictionary, so that if the
        # parents are deleted, references from the children won't keep
        # them alive.
        self._parents = WeakValueDictionary()

        # TransformNodes start out as invalid until their values are
        # computed for the first time.
        self._invalid = 1
        self._shorthand_name = shorthand_name or '' 

def test_weak_values(self):
        #
        #  This exercises d.copy(), d.items(), d[], del d[], len(d).
        #
        dict, objects = self.make_weak_valued_dict()
        for o in objects:
            self.assertEqual(weakref.getweakrefcount(o), 1,
                         "wrong number of weak references to %r!" % o)
            self.assertIs(o, dict[o.arg],
                         "wrong object returned by weak dict!")
        items1 = dict.items()
        items2 = dict.copy().items()
        items1.sort()
        items2.sort()
        self.assertEqual(items1, items2,
                     "cloning of weak-valued dictionary did not work!")
        del items1, items2
        self.assertEqual(len(dict), self.COUNT)
        del objects[0]
        self.assertEqual(len(dict), (self.COUNT - 1),
                     "deleting object did not cause dictionary update")
        del objects, o
        self.assertEqual(len(dict), 0,
                     "deleting the values did not clear the dictionary")
        # regression on SF bug #447152:
        dict = weakref.WeakValueDictionary()
        self.assertRaises(KeyError, dict.__getitem__, 1)
        dict[2] = C()
        self.assertRaises(KeyError, dict.__getitem__, 2) 

def global_cache(srctype, ffi, funcname, *args, **kwds):
    key = kwds.pop('key', (funcname, args))
    assert not kwds
    try:
        return ffi._backend.__typecache[key]
    except KeyError:
        pass
    except AttributeError:
        # initialize the __typecache attribute, either at the module level
        # if ffi._backend is a module, or at the class level if ffi._backend
        # is some instance.
        if isinstance(ffi._backend, types.ModuleType):
            ffi._backend.__typecache = weakref.WeakValueDictionary()
        else:
            type(ffi._backend).__typecache = weakref.WeakValueDictionary()
    try:
        res = getattr(ffi._backend, funcname)(*args)
    except NotImplementedError as e:
        raise NotImplementedError("%s: %r: %s" % (funcname, srctype, e))
    # note that setdefault() on WeakValueDictionary is not atomic
    # and contains a rare bug (http://bugs.python.org/issue19542);
    # we have to use a lock and do it ourselves
    cache = ffi._backend.__typecache
    with global_lock:
        res1 = cache.get(key)
        if res1 is None:
            cache[key] = res
            return res
        else:
            return res1 

def test_weak_valued_dict_popitem(self):
        self.check_popitem(weakref.WeakValueDictionary,
                           "key1", C(), "key2", C()) 

def test_weak_valued_dict_setdefault(self):
        self.check_setdefault(weakref.WeakValueDictionary,
                              "key", C(), C()) 

def __init__(self, *args, **kwargs):
        super(User, self).__init__(*args, **kwargs)

        self._user_cache = WeakValueDictionary()

        self.on(self.EVENT_DISCONNECTED, self.__handle_disconnect)
        self.on(self.EVENT_LOGGED_ON, self.__handle_set_persona)
        self.on(EMsg.ClientPersonaState, self.__handle_persona_state)
        self.on(EMsg.ClientFriendMsgIncoming, self.__handle_message_incoming)
        self.on("FriendMessagesClient.IncomingMessage#1", self.__handle_message_incoming2) 

def __init__(self, analysis_directory, use_recalibrated_state=False, scan_merging_parameters=None):
        if sys.version_info.major == 2:
            if not isinstance(analysis_directory, unicode):
                raise ValueError("analysis_directory must be a Unicode string.")
        if sys.version_info.major == 3:
            if not isinstance(analysis_directory, str):
                raise ValueError("analysis_directory must be a string.")
        if scan_merging_parameters is None:
            scan_merging_parameters = default_scan_merging_parameters.copy()
        else:
            for key, value in default_scan_merging_parameters.items():
                scan_merging_parameters.setdefault(key, value)

        self.dll = load_library()

        self.handle = self.dll.tims_open(
            analysis_directory.encode('utf-8'), 1 if use_recalibrated_state else 0)
        if self.handle == 0:
            throw_tims_error(self.dll)

        self.conn = sqlite3.connect(os.path.join(analysis_directory, "analysis.tdf"))
        self.conn.row_factory = sqlite3.Row

        self.initial_frame_buffer_size = 128 # may grow in readScans()
        self._read_metadata()
        self._frame_cache = WeakValueDictionary()
        self._scan_merging_parameters = scan_merging_parameters 

def __init__(cls, *args, **kwargs):
        cls.__instances = weakref.WeakValueDictionary()
        cls.__strong_cache = OrderedDict()
        cls.__strong_cache_size = 8 

def __init__(cls, *args, **kwargs):
        cls.__instances = weakref.WeakValueDictionary()
        cls.__strong_cache = OrderedDict()
        cls.__strong_cache_size = 8 

def __setstate__(self, data_dict):
        self.__dict__ = data_dict
        # turn the normal dictionary back into a WeakValueDictionary
        self._parents = WeakValueDictionary(self._parents) 

def global_cache(srctype, ffi, funcname, *args, **kwds):
    key = kwds.pop('key', (funcname, args))
    assert not kwds
    try:
        return ffi._backend.__typecache[key]
    except KeyError:
        pass
    except AttributeError:
        # initialize the __typecache attribute, either at the module level
        # if ffi._backend is a module, or at the class level if ffi._backend
        # is some instance.
        if isinstance(ffi._backend, types.ModuleType):
            ffi._backend.__typecache = weakref.WeakValueDictionary()
        else:
            type(ffi._backend).__typecache = weakref.WeakValueDictionary()
    try:
        res = getattr(ffi._backend, funcname)(*args)
    except NotImplementedError as e:
        raise NotImplementedError("%s: %r: %s" % (funcname, srctype, e))
    # note that setdefault() on WeakValueDictionary is not atomic
    # and contains a rare bug (http://bugs.python.org/issue19542);
    # we have to use a lock and do it ourselves
    cache = ffi._backend.__typecache
    with global_lock:
        res1 = cache.get(key)
        if res1 is None:
            cache[key] = res
            return res
        else:
            return res1 

def test_weak_valued_len_race(self):
        self.check_len_race(weakref.WeakValueDictionary, lambda k: (1, k)) 

def test_weak_valued_len_cycles(self):
        self.check_len_cycles(weakref.WeakValueDictionary, lambda n, k: (n, k)) 

def test_copy_weakvaluedict(self):
        self._check_copy_weakdict(weakref.WeakValueDictionary) 

def __init__(self):
        self.__memo = weakref.WeakValueDictionary() 

def __init__(self, size=4, timeout=1<<31, logger=logger):

        self._lock = threading.RLock()
        self._logger = logger
        self._size = size
        self._timeout = timeout  # seconds

        # A weak mapping, id(resource) -> resource.
        self._all = weakref.WeakValueDictionary()

        # A stack of resources available to check out.
        self._available = [] 

def __setstate__(self, data_dict):
        self.__dict__ = data_dict
        # turn the normal dictionary back into a WeakValueDictionary
        self._parents = WeakValueDictionary(self._parents) 

def __init__(self):
        self.__memo = weakref.WeakValueDictionary() 

def test_copy_weakvaluedict(self):
        self._check_copy_weakdict(weakref.WeakValueDictionary) 

def test_weak_valued_delitem(self):
        d = weakref.WeakValueDictionary()
        o1 = Object('1')
        o2 = Object('2')
        d['something'] = o1
        d['something else'] = o2
        self.assertTrue(len(d) == 2)
        del d['something']
        self.assertTrue(len(d) == 1)
        self.assertTrue(d.items() == [('something else', o2)]) 

def test_weak_valued_dict_update(self):
        self.check_update(weakref.WeakValueDictionary,
                          {1: C(), 'a': C(), C(): C()}) 

def test_weak_valued_dict_setdefault(self):
        self.check_setdefault(weakref.WeakValueDictionary,
                              "key", C(), C())