code: def test_filter(self):
      t = self.t_env.from_elements(
          [(1, "Hi", "Hello")], ["a", "b", "c"]
      )
      result = t.filter((t.a > 1) & (t.b == "Hello"))
      query_operation = result._j_table.getQueryOperation()
      self.assertEqual(
          "and(" "greaterThan(a, 1), " "equals(b, 'Hello'))",
          query_operation.getCondition().toString(),
      )
  
file_path: flink/flink-python/pyflink/table/tests/test_calc.py
imports: import array
  import datetime
  from decimal import Decimal
  from pyflink.common import Row
  from pyflink.table import DataTypes
  from pyflink.table.expressions import row
  from pyflink.table.tests.test_types import PythonOnlyPoint, PythonOnlyUDT
  from pyflink.testing import source_sink_utils
  from pyflink.testing.test_case_utils import PyFlinkStreamTableTestCase
label_desc: Use image node_id 4 for calling the StreamTableCalcTests obj's underlying member method code with example usage: obj.test_filter() without return types