Method Convert

python/pyarrow/src/arrow/python/arrow_to_pandas.cc:2487–2510

  }

  Status Convert(PyObject** out) override {
    PyAcquireGIL lock;

    PyObject* result = PyList_New(0);
    RETURN_IF_PYERROR();

    for (int i = 0; i < num_columns_; ++i) {
      std::shared_ptr<PandasWriter> writer;
      RETURN_NOT_OK(GetWriter(i, &writer));
      // ARROW-3789 Use std::move on the array to permit self-destructing
      RETURN_NOT_OK(writer->Write(std::move(arrays_[i]), i, /*rel_placement=*/0));

      PyObject* item;
      RETURN_NOT_OK(writer->GetDataFrameResult(&item));
      if (PyList_Append(result, item) < 0) {
        RETURN_IF_PYERROR();
      }
      // PyList_Append increments object refcount
      Py_DECREF(item);
    }

    *out = result;
    return Status::OK();
  }

 private:
  std::vector<std::shared_ptr<PandasWriter>> writers_;