inspect.getmro(cls) Return a tuple of class cls’s base classes, including cls, in method resolution order. No class appears

sys.maxsize An integer giving the maximum value a variable of type Py_ssize_t can take. It’s usually 2**31

sys.warnoptions This is an implementation detail of the warnings framework; do not modify this value. Refer to the

sys.last_type sys.last_value sys.last_traceback These three variables

callback(callback, *args, **kwds) Accepts an arbitrary callback function and arguments and adds it to the callback stack.

inspect.isdatadescriptor(object) Return true if the object is a data descriptor. Data descriptors

gc.garbage A list of objects which the collector found to be unreachable but could not be freed (uncollectable objects). Starting

gc.disable() Disable automatic garbage collection.

gc.get_referrers(*objs) Return the list of objects that directly refer to any of objs. This function will only locate those

traceback.print_exception(etype, value, tb, limit=None, file=None, chain=True) Print exception information and stack trace entries