code: def test_table_is_valid_filter_date(self):
      filter = ["a", t_filter_op.FILTER_OP_GT, date.today()]
      tbl = Table({"a": date})
      assert tbl.is_valid_filter(filter) is True
  
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 34 for calling the TestTable obj's underlying member method code with example usage: obj.test_table_is_valid_filter_date() without return types