code: def test_multilevel_name_print_0(self):
      # GH#55415 None does not get printed, but 0 does
      # (matching DataFrame and flat index behavior)
      mi = pd.MultiIndex.from_product(
          [range(2, 3), range(3, 4)], names=[0, None]
      )
      ser = Series(1.5, index=mi)
  
      res = repr(ser)
      expected = "0   \n2  3    1.5\ndtype: float64"
      assert res == expected
  
imports: from datetime import datetime, timedelta
  import numpy
  import pytest
  from pandas._config import using_pyarrow_string_dtype
  import pandas
  from pandas import Categorical, DataFrame, Index, Series, date_range, option_context, period_range, timedelta_range
  import pandas._testing
label_desc: Use image node_id 1 for calling the TestSeriesRepr obj's underlying member method code with example usage: obj.test_multilevel_name_print_0() without return types