message: [XLA:Python] Expose new use_spmd_partitioning compile option.
diff: @@ -1406,7 +1406,10 @@ PYBIND11_MODULE(xla_extension, m) {
  options.device_assignment())
  : absl::nullopt;
  },
  - &ExecutableBuildOptions::set_device_assignment);
  + &ExecutableBuildOptions::set_device_assignment)
  + .def_property("use_spmd_partitioning",
  + &ExecutableBuildOptions::use_spmd_partitioning,
  + &ExecutableBuildOptions::set_use_spmd_partitioning);
  py::class_<XlaComputation>(m, "XlaComputation")
  .def(py::init([](const py::bytes& serialized_hlo_module_proto)
  