diff -r 5b60464efbde -r c32454d69b85 contrib/python-zstandard/c-ext/compressiondict.c
--- a/contrib/python-zstandard/c-ext/compressiondict.c	Thu Feb 09 21:44:32 2017 -0500
+++ b/contrib/python-zstandard/c-ext/compressiondict.c	Tue Feb 07 23:24:47 2017 -0800
@@ -28,7 +28,8 @@
 	void* dict;
 	ZstdCompressionDict* result;
 
-	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "nO!|O!", kwlist,
+	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "nO!|O!:train_dictionary",
+		kwlist,
 		&capacity,
 		&PyList_Type, &samples,
 		(PyObject*)&DictParametersType, &parameters)) {
@@ -57,7 +58,6 @@
 		sampleItem = PyList_GetItem(samples, sampleIndex);
 		if (!PyBytes_Check(sampleItem)) {
 			PyErr_SetString(PyExc_ValueError, "samples must be bytes");
-			/* TODO probably need to perform DECREF here */
 			return NULL;
 		}
 		samplesSize += PyBytes_GET_SIZE(sampleItem);
@@ -133,10 +133,11 @@
 	self->dictSize = 0;
 
 #if PY_MAJOR_VERSION >= 3
-	if (!PyArg_ParseTuple(args, "y#", &source, &sourceSize)) {
+	if (!PyArg_ParseTuple(args, "y#:ZstdCompressionDict",
 #else
-	if (!PyArg_ParseTuple(args, "s#", &source, &sourceSize)) {
+	if (!PyArg_ParseTuple(args, "s#:ZstdCompressionDict",
 #endif
+		&source, &sourceSize)) {
 		return -1;
 	}