code: def test_update_partial_subcolumn_dict(self):
      tbl = Table([{"a": "abc", "b": 123, "c": 456}], index="a")
      tbl.update({"a": ["abc"], "c": [1234]})
      assert tbl.view().to_records() == [
          {"a": "abc", "b": 123, "c": 1234}
      ]
  
imports: import numpy
  import pyarrow
  import pandas
  from datetime import date, datetime
  from perspective.table import Table
  from pytest import mark
label_desc: Use image node_id 15 for calling the TestUpdate obj's underlying member method code with example usage: obj.test_update_partial_subcolumn_dict() without return types