fix: detect duplicate data arg in tp_init

Author: ifduyue

src/_xxhash.c

@@ -530,6 +530,10 @@ static int PYXXH32_init(PYXXH32Object *self, PyObject *args, PyObject *kwargs)
 
     if (nargs >= 1) {
         data_obj = PyTuple_GET_ITEM(args, 0);
+        if (kwargs && PyDict_GetItemString(kwargs, "data")) {
+            PyErr_SetString(PyExc_TypeError, "__init__() got multiple values for argument 'data'");
+            return -1;
+        }
         if (nargs > 1) {
             PyErr_SetString(PyExc_TypeError, "__init__() takes at most 1 positional argument");
             return -1;
@@ -901,6 +905,10 @@ static int PYXXH64_init(PYXXH64Object *self, PyObject *args, PyObject *kwargs)
 
     if (nargs >= 1) {
         data_obj = PyTuple_GET_ITEM(args, 0);
+        if (kwargs && PyDict_GetItemString(kwargs, "data")) {
+            PyErr_SetString(PyExc_TypeError, "__init__() got multiple values for argument 'data'");
+            return -1;
+        }
         if (nargs > 1) {
             PyErr_SetString(PyExc_TypeError, "__init__() takes at most 1 positional argument");
             return -1;
@@ -1271,6 +1279,10 @@ static int PYXXH3_64_init(PYXXH3_64Object *self, PyObject *args, PyObject *kwarg
 
     if (nargs >= 1) {
         data_obj = PyTuple_GET_ITEM(args, 0);
+        if (kwargs && PyDict_GetItemString(kwargs, "data")) {
+            PyErr_SetString(PyExc_TypeError, "__init__() got multiple values for argument 'data'");
+            return -1;
+        }
         if (nargs > 1) {
             PyErr_SetString(PyExc_TypeError, "__init__() takes at most 1 positional argument");
             return -1;
@@ -1650,6 +1662,10 @@ static int PYXXH3_128_init(PYXXH3_128Object *self, PyObject *args, PyObject *kwa
 
     if (nargs >= 1) {
         data_obj = PyTuple_GET_ITEM(args, 0);
+        if (kwargs && PyDict_GetItemString(kwargs, "data")) {
+            PyErr_SetString(PyExc_TypeError, "__init__() got multiple values for argument 'data'");
+            return -1;
+        }
         if (nargs > 1) {
             PyErr_SetString(PyExc_TypeError, "__init__() takes at most 1 positional argument");
             return -1;