Will two queue.Queue instances ever be equal or identical?
I have some code where Queue instances are created, appended to a list and later removed.
l = []
def example():
q = Queue()
l.append(q)
thingy = q.get() # wait on background worker thread to put something in queue
# ... do something with thingy ...
l.remove(q)
For (I think irrelevant) context, other threads in the wider program will be putting their own Queues into the list, and there is also a background worker thread which will be putting objects into the Queues it finds in the list.
I understand that list.remove() first checks for identity and then checks for equality. Therefore I want to know if two Queue instances will ever be evaluated as equal or identical.
Two objects are equal (==) if one of their __eq__ methods evaluate as True.
Two objects are identical (is) if they are in fact the same object at the same memory address.
If a class (or its parents) do not implement the __eq__ method, then an equality comparison falls back to being an identity comparison.
The Queue class does not implement __eq__ so two Queue object will only ever be equal if they are in fact identical.
This can be demonstrated by the fact that Queue() == Queue() is False.