Function assert_not_in_reference_cycle

lib/matplotlib/tests/test_axes.py:10032–10043

(start)

)
def test_axes_clear_reference_cycle():
    def assert_not_in_reference_cycle(start):
        # Breadth first search. Return True if we encounter the starting node
        to_visit = deque([start])
        explored = set()
        while len(to_visit) > 0:
            parent = to_visit.popleft()
            for child in gc.get_referents(parent):
                if id(child) in explored:
                    continue
                assert child is not start
                explored.add(id(child))
                to_visit.append(child)

    fig = Figure()
    ax = fig.add_subplot()