code: def test_update_np_one_col(self):
      tbl = Table(
          {"a": np.array([1, 2, 3, 4]), "b": np.array([2, 3, 4, 5])}
      )
      tbl.update({"a": np.array([5, 6, 7, 8])})
      assert tbl.view().to_dict() == {
          "a": [1, 2, 3, 4, 5, 6, 7, 8],
          "b": [2, 3, 4, 5, None, None, None, None],
      }
  
imports: import numpy
  from datetime import date, datetime
  from pytest import mark
  from perspective.table import Table
label_desc: Use image node_id 2 for calling the TestUpdateNumpy obj's underlying member method code with example usage: obj.test_update_np_one_col() without return types