PREV_MASK_COLLECTING is used only while collecting and cleared before GC ends. or _PyObject_GC_UNTRACK() is called. During a collection, _gc_prev is ... ... <看更多>

... because [1,2] still has two another reference so Python garbage-collection system doesn't remove [1,2] do to the having no reference. ... <看更多>

Reuse of primitive objects, Effects of the del command, Reference Counting, Garbage Collector for Reference Cycles, Viewing the refcount of an object, ... ... <看更多>