def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
# widget -> message or None
self.widget_message_dict = {}
# message -> widget
self.message_widget_dict = {}
self.status_bar = None
self.prompt_bar = None
# lock when managing notifications:
# * when accessing self.notification_*
# * when accessing widgets
# and most importantly, remember, locking is voodoo
self.notifications_lock = threading.RLock()
# populated when loop and UI are instantiated
self.loop = None
self.commander = None
self.buffers = []
self.buffer_movement_history = OrderedSet()
self.main_list_buffer = None # singleton
self.current_buffer = None
def test_ordered_set():
s = OrderedSet()
s.append(1)
assert s == [1]
s.append(2)
assert s == [1, 2]
s.append(1)
assert s == [2, 1]
