def demo():
    from gc import (set_debug, DEBUG_LEAK, collect)
    collect()
    set_debug(DEBUG_LEAK)
    for test in (throw_leaks, close_leaks, del_leaks, next_okay, send_okay):
        print("Testing", test.__name__)
        g = leaky_generator()
        next(g)
        # Generator is now at the "yield" line
        print(g.gi_frame, "line", g.gi_frame.f_lineno)
        test(g)
        del g
        print("Leak count:", collect())

def leaky_generator():
    try:
        raise Exception()
    except:  # Exception handler with anonymous exception variable
        yield  # Yield from exception handler

def throw_leaks(g):
    try:
        g.throw(Exception())
    except Exception:
        pass
def close_leaks(g):
    g.close()
def del_leaks(g):
    pass
def next_okay(g):
    try:
        next(g)
    except StopIteration:
        pass
def send_okay(g):
    try:
        g.send(None)
    except StopIteration:
        pass

if __name__ == "__main__":
    demo()