code: def test_fillna_dictlike_value_duplicate_colnames(self, columns):
      # GH#43476
      df = DataFrame(np.nan, index=[0, 1], columns=columns)
      with tm.assert_produces_warning(None):
          result = df.fillna({"A": 0})
  
      expected = df.copy()
      expected["A"] = 0.0
      tm.assert_frame_equal(result, expected)
  
imports: import numpy
  import pytest
  from pandas._config import using_pyarrow_string_dtype
  from pandas import Categorical, DataFrame, DatetimeIndex, NaT, PeriodIndex, Series, TimedeltaIndex, Timestamp, date_range, to_datetime
  import pandas._testing
  from pandas.tests.frame.common import _check_mixed_float
label_desc: Use image node_id 17 for calling the TestFillNA obj's underlying member method code with example usage: obj.test_fillna_dictlike_value_duplicate_colnames(columns) without return types