Function DeserializeExtInstance

python/pyarrow/src/arrow/python/extension_type.cc:55–70

Deserialize a Python ExtensionType instance

// Deserialize a Python ExtensionType instance
PyObject* DeserializeExtInstance(PyObject* type_class,
                                 std::shared_ptr<DataType> storage_type,
                                 const std::string& serialized_data) {
  OwnedRef storage_ref(wrap_data_type(storage_type));
  if (!storage_ref) {
    return nullptr;
  }
  OwnedRef data_ref(PyBytes_FromStringAndSize(
      serialized_data.data(), static_cast<Py_ssize_t>(serialized_data.size())));
  if (!data_ref) {
    return nullptr;
  }

  return cpp_PyObject_CallMethod(type_class, "__arrow_ext_deserialize__", "OO",
                                 storage_ref.obj(), data_ref.obj());
}

}  // namespace