code: def test_update_csv(self):
      tbl = Table({"a": str, "b": int})
  
      view = tbl.view()
      tbl.update("a,b\nxyz,123\ndef,100000000")
  
      assert view.to_dict() == {
          "a": ["xyz", "def"],
          "b": [123, 100000000],
      }
  
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 4 for calling the TestUpdate obj's underlying member method code with example usage: obj.test_update_csv() without return types