code: def test_to_csv_string_array_ascii(self):
      # GH 10813
      str_array = [{"names": ["foo", "bar"]}, {"names": ["baz", "qux"]}]
      df = DataFrame(str_array)
      expected_ascii = """\
  ,names
  0,"['foo', 'bar']"
  1,"['baz', 'qux']"
  """
      with tm.ensure_clean("str_test.csv") as path:
          df.to_csv(path, encoding="ascii")
          with open(path, encoding="utf-8") as f:
              assert f.read() == expected_ascii
  
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 18 for calling the TestToCSV obj's underlying member method code with example usage: obj.test_to_csv_string_array_ascii() without return types