2842 filterstring(PyObject *func, PyObject *strobj)  in filterstring()  argument
2846     Py_ssize_t len = PyString_Size(strobj);  in filterstring()
2854         if (PyString_CheckExact(strobj)) {  in filterstring()
2855             Py_INCREF(strobj);  in filterstring()
2856             return strobj;  in filterstring()
2866         item = (*strobj->ob_type->tp_as_sequence->sq_item)(strobj, i);  in filterstring()
2971 filterunicode(PyObject *func, PyObject *strobj)  in filterunicode()  argument
2975     Py_ssize_t len = PyUnicode_GetSize(strobj);  in filterunicode()
2983         if (PyUnicode_CheckExact(strobj)) {  in filterunicode()
2984             Py_INCREF(strobj);  in filterunicode()
2985             return strobj;  in filterunicode()
2995         item = (*strobj->ob_type->tp_as_sequence->sq_item)(strobj, i);  in filterunicode()