code: def test_to_csv_float_ea_float_format(self):
      # GH#45991
      df = DataFrame({"a": [1.1, 2.02, pd.NA, 6.000006], "b": "c"})
      df["a"] = df["a"].astype("Float64")
      result = df.to_csv(index=False, float_format="%.5f")
      expected = tm.convert_rows_list_to_csv_str(
          ["a,b", "1.10000,c", "2.02000,c", ",c", "6.00001,c"]
      )
      assert result == expected
  
imports: import io
  import os
  import sys
  from zipfile import ZipFile
  from _csv import Error
  import numpy
  import pytest
  import pandas
  from pandas import DataFrame, Index, compat
  import pandas._testing
label_desc: Use image node_id 14 for calling the TestToCSV obj's underlying member method code with example usage: obj.test_to_csv_float_ea_float_format() without return types