const tensorflow::quantization::PyFunctionLibrary*
                      quantization_py_function_library) {
  // Use Python C API to validate and convert arguments. In py3 (bytes),
  // in py2 (str).
  auto ConvertArg = [&](PyObject* obj, bool* error) {
    char* buf;
    Py_ssize_t len;
    if (::tflite::python_utils::ConvertFromPyString(obj, &buf, &len) == -1) {
      *error = true;

**macOS**                     | [![Status](https://storage.googleapis.com/tensorflow-kokoro-build-badges/macos-py2-cc.svg)](https://storage.googleapis.com/tensorflow-kokoro-build-badges/macos-py2-cc.html)     | [PyPI](https://pypi.org/project/tf-nightly/)