test_gc
list 0x831a754
dict 0x831a754
list 0x831a754
tuple 0x831a734
class 0x831a794
<test_gc.A instance at 831a754>
a <test_gc.A instance at 831a754>
b <test_gc.B instance at 831a95c>
dict 0x831a9bc
func 0x831d9e4
