pydispatch.utils module¶

WeakMethodContainer class¶

class WeakMethodContainer(**kw)[source]¶

Container to store weak references to callbacks

Instance methods are stored using the underlying function object and the instance id (using id(obj)) as the key (a two-tuple) and the object itself as the value. This ensures proper weak referencing.

Functions are stored using the string “function” and the id of the function as the key (a two-tuple).

add_method(m, **kwargs)[source]¶

Add an instance method or function

Parameters:	m – The instance method or function to store

del_instance(obj)[source]¶

Remove any stored instance methods that belong to an object

Parameters:	obj – The instance object to remove

del_method(m)[source]¶

Remove an instance method or function if it exists

Parameters:	m – The instance method or function to remove

iter_instances()[source]¶

Iterate over the stored objects

Yields:	wrkey – The two-tuple key used to store the object obj: The instance or function object

iter_methods()[source]¶

Iterate over stored functions and instance methods

Yields:	Instance methods or function objects

keys() → a set-like object providing a view on D's keys[source]¶

InformativeWVDict class¶

class InformativeWVDict(**kwargs)[source]¶

Bases: weakref.WeakValueDictionary

A WeakValueDictionary providing a callback for deletion

Keyword Arguments:
	del_callback – A callback function that will be called when an item is either deleted or dereferenced. It will be called with the key as the only argument.

EmissionHoldLock class¶

class EmissionHoldLock(event_instance)[source]¶: Bases: pydispatch.utils.EmissionHoldLock_, pydispatch.aioutils.AioEmissionHoldLock

EmissionHoldLock_ class¶

class EmissionHoldLock_(event_instance)[source]¶

Context manager used for pydispatch.dispatch.Dispatcher.emission_lock()

Parameters:	event_instance – The `Event` instance associated with the lock

event_instance¶: The Event instance associated with the lock

last_event¶: The positional and keyword arguments from the event’s last emission as a two-tuple. If no events were triggered while the lock was held, None.

held¶: bool – The internal state of the lock

AioEmissionHoldLock class¶

class AioEmissionHoldLock[source]¶

Bases: object

Async context manager mixin for pydispatch.utils.EmissionHoldLock_

Supports use in async with statements