Function InitPandasStaticData

python/pyarrow/src/arrow/python/helpers.cc:374–406

}  // namespace

void InitPandasStaticData() {
  pandas_runner.RunOnce([](OwnedRef& module) {
    OwnedRef ref;

    // set NaT sentinel and its type
    if (ImportFromModule(module.obj(), "NaT", &ref).ok()) {
      pandas_NaT = ref.obj();
      // PyObject_Type returns a new reference but we trust that pandas.NaT will
      // outlive our use of this PyObject*
      pandas_NaTType = Py_TYPE(ref.obj());
    }

    // retain a reference to Timedelta
    if (ImportFromModule(module.obj(), "Timedelta", &ref).ok()) {
      pandas_Timedelta = ref.obj();
    }

    // retain a reference to Timestamp
    if (ImportFromModule(module.obj(), "Timestamp", &ref).ok()) {
      pandas_Timestamp = ref.obj();
    }

    // if pandas.NA exists, retain a reference to it
    if (ImportFromModule(module.obj(), "NA", &ref).ok()) {
      pandas_NA = ref.obj();
    }

    // Import DateOffset type
    if (ImportFromModule(module.obj(), "DateOffset", &ref).ok()) {
      pandas_DateOffset = ref.obj();
    }
  });
}

bool PandasObjectIsNull(PyObject* obj) {
  if (!MayHaveNaN(obj)) {