Python weakref.WeakKeyDictionary方法代码示例

# 需要导入模块: import weakref [as 别名]
# 或者: from weakref import WeakKeyDictionary [as 别名]
def _make_cached_stream_func(src_func, wrapper_func):
    cache = WeakKeyDictionary()
    def func():
        stream = src_func()
        try:
            rv = cache.get(stream)
        except Exception:
            rv = None
        if rv is not None:
            return rv
        rv = wrapper_func()
        try:
            stream = src_func()  # In case wrapper_func() modified the stream
            cache[stream] = rv
        except Exception:
            pass
        return rv
    return func 

# 需要导入模块: import weakref [as 别名]
# 或者: from weakref import WeakKeyDictionary [as 别名]
def _make_cached_stream_func(src_func, wrapper_func):
    cache = WeakKeyDictionary()
    def func():
        stream = src_func()
        try:
            rv = cache.get(stream)
        except Exception:
            rv = None
        if rv is not None:
            return rv
        rv = wrapper_func()
        try:
            cache[stream] = rv
        except Exception:
            pass
        return rv
    return func 

# 需要导入模块: import weakref [as 别名]
# 或者: from weakref import WeakKeyDictionary [as 别名]
def __init__(self, name, value=None, expected_type=None, expected_types=None, allow_none=False):
        self.name = name
        self._values = WeakKeyDictionary()

        if expected_types is not None:
            self.expected_types = expected_types
        else:
            self.expected_types = []

        if expected_type is not None:
            self.expected_types.append(expected_type)
        self.allow_none = allow_none
        self.__doc__ = "Values must be of type {0}".format(self.expected_types)

        if value is not None:
            self.validate(value)
            self.default_value = value 

# 需要导入模块: import weakref [as 别名]
# 或者: from weakref import WeakKeyDictionary [as 别名]
def __init__(self, clickRadius=2, moveDistance=5, parent=None):
        QtGui.QGraphicsScene.__init__(self, parent)
        self.setClickRadius(clickRadius)
        self.setMoveDistance(moveDistance)
        self.exportDirectory = None
        
        self.clickEvents = []
        self.dragButtons = []
        self.mouseGrabber = None
        self.dragItem = None
        self.lastDrag = None
        self.hoverItems = weakref.WeakKeyDictionary()
        self.lastHoverEvent = None
        self.minDragTime = 0.5  # drags shorter than 0.5 sec are interpreted as clicks
        
        self.contextMenu = [QtGui.QAction("Export...", self)]
        self.contextMenu[0].triggered.connect(self.showExportDialog)
        
        self.exportDialog = None 

# 需要导入模块: import weakref [as 别名]
# 或者: from weakref import WeakKeyDictionary [as 别名]
def __init__(self, providing_args=None, use_caching=False):
        """
        Create a new signal.

        providing_args
            A list of the arguments this signal can pass along in a send() call.
        """
        self.receivers = []
        if providing_args is None:
            providing_args = []
        self.providing_args = set(providing_args)
        self.lock = threading.Lock()
        self.use_caching = use_caching
        # For convenience we create empty caches even if they are not used.
        # A note about caching: if use_caching is defined, then for each
        # distinct sender we cache the receivers that sender has in
        # 'sender_receivers_cache'. The cache is cleaned when .connect() or
        # .disconnect() is called and populated on send().
        self.sender_receivers_cache = weakref.WeakKeyDictionary() if use_caching else {}
        self._dead_receivers = False 

# 需要导入模块: import weakref [as 别名]
# 或者: from weakref import WeakKeyDictionary [as 别名]
def test_trashcan_16602(self):
        # Issue #16602: when a weakref's target was part of a long
        # deallocation chain, the trashcan mechanism could delay clearing
        # of the weakref and make the target object visible from outside
        # code even though its refcount had dropped to 0.  A crash ensued.
        class C(object):
            def __init__(self, parent):
                if not parent:
                    return
                wself = weakref.ref(self)
                def cb(wparent):
                    o = wself()
                self.wparent = weakref.ref(parent, cb)

        d = weakref.WeakKeyDictionary()
        root = c = C(None)
        for n in range(100):
            d[c] = c = C(c)
        del root
        gc.collect() 

# 需要导入模块: import weakref [as 别名]
# 或者: from weakref import WeakKeyDictionary [as 别名]
def test_deepcopy_weakkeydict(self):
        class C(object):
            def __init__(self, i):
                self.i = i
        a, b, c, d = [C(i) for i in xrange(4)]
        u = weakref.WeakKeyDictionary()
        u[a] = b
        u[c] = d
        # Keys aren't copied, values are
        v = copy.deepcopy(u)
        self.assertNotEqual(v, u)
        self.assertEqual(len(v), 2)
        self.assertFalse(v[a] is b)
        self.assertFalse(v[c] is d)
        self.assertEqual(v[a].i, b.i)
        self.assertEqual(v[c].i, d.i)
        del c
        self.assertEqual(len(v), 1) 

# 需要导入模块: import weakref [as 别名]
# 或者: from weakref import WeakKeyDictionary [as 别名]
def __init__(self, queue, enqueue_ops):
        """Create a PyQueueRunner.

        When you later call the `create_threads()` method, the `QueueRunner` will
        create one thread for each op in `enqueue_ops`.  Each thread will run its
        enqueue op in parallel with the other threads.  The enqueue ops do not have
        to all be the same op, but it is expected that they all enqueue tensors in
        `queue`.

        Args:
          qnqueue_handler: a python function that transforms
          queue: A `Queue`.
          enqueue_ops: List of enqueue ops to run in threads later.
        """
        self._queue = queue
        self._enqueue_ops = enqueue_ops

        self._lock = threading.Lock()
        # A map from a session object to the number of outstanding queue runner
        # threads for that session.
        self._runs_per_session = weakref.WeakKeyDictionary() 

# 需要导入模块: import weakref [as 别名]
# 或者: from weakref import WeakKeyDictionary [as 别名]
def connect(self, slot, sender=None):
    if sender:
      if inspect.ismethod(slot):
        if sender not in self._methods_subs:
          self._methods_subs[sender] = weakref.WeakKeyDictionary()

        if slot.__self__ not in self._methods_subs[sender]:
          self._methods_subs[sender][slot.__self__] = set()

        self._methods_subs[sender][slot.__self__].add(slot.__func__)
      else:
        if sender not in self._functions_subs:
          self._functions_subs[sender] = weakref.WeakSet()
        self._functions_subs[sender].add(slot)
    else:
      if inspect.ismethod(slot):
        if slot.__self__ not in self._methods:
          self._methods[slot.__self__] = set()
        self._methods[slot.__self__].add(slot.__func__)
      else:
        self._functions.add(slot) 

# 需要导入模块: import weakref [as 别名]
# 或者: from weakref import WeakKeyDictionary [as 别名]
def connect(self, s, func):
        """
        register *func* to be called when a signal *s* is generated
        func will be called
        """
        self._func_cid_map.setdefault(s, WeakKeyDictionary())
        if func in self._func_cid_map[s]:
            return self._func_cid_map[s][func]

        self._cid += 1
        cid = self._cid
        self._func_cid_map[s][func] = cid
        self.callbacks.setdefault(s, dict())
        proxy = _BoundMethodProxy(func)
        self.callbacks[s][cid] = proxy
        return cid 

# 需要导入模块: import weakref [as 别名]
# 或者: from weakref import WeakKeyDictionary [as 别名]
def tearDown(self):
        signal.signal(signal.SIGINT, self._default_handler)
        unittest.signals._results = weakref.WeakKeyDictionary()
        unittest.signals._interrupt_handler = None 

# 需要导入模块: import weakref [as 别名]
# 或者: from weakref import WeakKeyDictionary [as 别名]
def __init__(self, group=None, target=None, name=None, args=(), kwargs={}):
        threading.Thread.__init__(self, group, target, name, args, kwargs)
        self._pid = None
        self._children = weakref.WeakKeyDictionary()
        self._start_called = False
        self._parent = current_process() 

# 需要导入模块: import weakref [as 别名]
# 或者: from weakref import WeakKeyDictionary [as 别名]
def __init__(self, name, dtype=None, values=None):
        self.name = name
        self.dtype = dtype or 'string'
        self.values = values
        self.value = weakref.WeakKeyDictionary() 

# 需要导入模块: import weakref [as 别名]
# 或者: from weakref import WeakKeyDictionary [as 别名]
def _async_clients(cls):
        attr_name = '_async_client_dict_' + cls.__name__
        if not hasattr(cls, attr_name):
            setattr(cls, attr_name, weakref.WeakKeyDictionary())
        return getattr(cls, attr_name) 

# 需要导入模块: import weakref [as 别名]
# 或者: from weakref import WeakKeyDictionary [as 别名]
def __init__(self, value_type, offset, default, documentation):
        SpecificNamedField = type('SpecificNamedField', (NamedField,), {'__doc__': documentation})
        self._named_field = SpecificNamedField(value_type, offset, default, documentation)
        self._instance_data = WeakKeyDictionary()