+/**
+ * Convert a Python list of unicode strings to a C string vector.
+ * On success, a pointer to a newly allocated NULL-terminated array of
+ * allocated C strings is written to @a out_strv. The caller must g_free()
+ * each string and the array itself.
+ *
+ * @param[in] py_strseq The sequence object.
+ * @param[out] out_strv Address of string vector to be filled in.
+ *
+ * @return SRD_OK upon success, a (negative) error code otherwise.
+ *
+ * @private
+ */
+SRD_PRIV int py_strseq_to_char(PyObject *py_strseq, char ***out_strv)
+{
+ PyObject *py_item, *py_bytes;
+ char **strv, *str;
+ ssize_t seq_len, i;
+
+ if (!PySequence_Check(py_strseq)) {
+ srd_err("Object does not provide sequence protocol.");
+ return SRD_ERR_PYTHON;
+ }
+
+ seq_len = PySequence_Size(py_strseq);
+ if (seq_len < 0) {
+ srd_exception_catch("Failed to obtain sequence size");
+ return SRD_ERR_PYTHON;
+ }
+
+ strv = g_try_new0(char *, seq_len + 1);
+ if (!strv) {
+ srd_err("Failed to allocate result string vector.");
+ return SRD_ERR_MALLOC;
+ }
+
+ for (i = 0; i < seq_len; i++) {
+ py_item = PySequence_GetItem(py_strseq, i);
+ if (!py_item)
+ goto err_out;
+
+ if (!PyUnicode_Check(py_item)) {
+ Py_DECREF(py_item);
+ goto err_out;
+ }
+ py_bytes = PyUnicode_AsUTF8String(py_item);
+ Py_DECREF(py_item);
+ if (!py_bytes)
+ goto err_out;
+
+ str = g_strdup(PyBytes_AsString(py_bytes));
+ Py_DECREF(py_bytes);
+ if (!str)
+ goto err_out;
+
+ strv[i] = str;
+ }
+ *out_strv = strv;
+
+ return SRD_OK;
+
+err_out:
+ g_strfreev(strv);
+ srd_exception_catch("Failed to obtain string item");
+
+ return SRD_ERR_PYTHON;