code: def test_distill_20_sequence_dict(self):
      eq_(self.module._distill_params_20(({"a": 1},)), ({"a": 1},))
      eq_(
          self.module._distill_params_20([{"a": 1}, {"a": 2}]),
          [{"a": 1}, {"a": 2}],
      )
      eq_(
          self.module._distill_params_20((MappingProxyType({"a": 1}),)),
          (MappingProxyType({"a": 1}),),
      )
  
imports: import datetime
  import re
  from types import MappingProxyType
  from sqlalchemy import exc
  from sqlalchemy.engine import processors
  from sqlalchemy.testing import assert_raises_message
  from sqlalchemy.testing import eq_
  from sqlalchemy.testing import expect_raises_message
  from sqlalchemy.testing import fixtures
  from sqlalchemy.util import immutabledict
label_desc: Use image node_id 4 for calling the _DistillArgsTest obj's underlying member method code with example usage: obj.test_distill_20_sequence_dict() without return types