Add PyInit__torchaudio

Author: pearu

src/libtorchaudio/_torchaudio.cpp

@@ -1,6 +1,8 @@
 #include <libtorchaudio/utils.h>
 #include <torch/csrc/stable/library.h>
 
+#include <Python.h>
+
 STABLE_TORCH_LIBRARY(_torchaudio, m) {
   m.def("is_align_available() -> bool");
   m.def("cuda_version() -> int?");
@@ -10,3 +12,11 @@ STABLE_TORCH_LIBRARY_IMPL(_torchaudio, CompositeExplicitAutograd, m) {
   m.impl("is_align_available", TORCH_BOX(&torchaudio::is_align_available));
   m.impl("cuda_version", TORCH_BOX(&torchaudio::cuda_version));
 }
+
+static struct PyModuleDef _torchaudio_module = {
+    .m_base = PyModuleDef_HEAD_INIT,
+    .m_name = "_torchaudio"};
+
+PyMODINIT_FUNC PyInit__torchaudio(void) {
+  return PyModuleDef_Init(&_torchaudio_module);
+}