if ((filled < 0) && data) /* if the string is in a negative number, it refers to the 'data' list. */
filled = PyInt_AsLong(PyTuple_GetItem(data, -filled));
if ((filled < 0) && data) /* if the string is in a negative number, it refers to the 'data' list. */
filled = PyInt_AsLong(PyTuple_GetItem(data, -filled));