There is a minor issue here. For gc.get_referrers and gc.get_referents, probably the format code for PySys_Audit should be "(O)" instead of "O". Typically the tuple `args` passed to the hook functions are fixed-length as described in the audit events table. Here `objs` itself is a tuple (containing variable-length arguments) and directly passed to the audit hook with being wrapped by another layer of tuple. If the hook function is to receive a variable-length tuple, probably the documentation should be updated to mention this.