code: def test_table_datetime(self):
      str_data = [{"a": datetime.now(), "b": datetime.now()}]
      tbl = Table(str_data)
      assert tbl.size() == 1
      assert tbl.schema() == {"a": datetime, "b": datetime}
  
imports: import sys
  from datetime import date, datetime
  from perspective.core.exception import PerspectiveError
  from perspective.table import Table
  from perspective.table._state import _PerspectiveStateManager
  from perspective.table.libpsppy import PerspectiveCppError, t_filter_op
  from pytest import raises
label_desc: Use image node_id 20 for calling the TestTable obj's underlying member method code with example usage: obj.test_table_datetime() without return types