base-stats,python: Expose a stat's unit via PyBind11

Change-Id: I77df868a6bc92e5bb0a39592b5aca8e0d259bb05
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/41753
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>

src/python/pybind11/stats.cc

@@ -132,6 +132,9 @@ pybind_init_stats(py::module_ &m_native)
     py::class_<Stats::Info, std::unique_ptr<Stats::Info, py::nodelete>>(
         m, "Info")
         .def_readwrite("name", &Stats::Info::name)
+        .def_property_readonly("unit", [](const Stats::Info &info) {
+                return info.unit->getUnitString();
+            })
         .def_readonly("desc", &Stats::Info::desc)
         .def_readonly("id", &Stats::Info::id)
         .def_property_readonly("flags", [](const Stats::Info &info) {