code: def test_to_csv_withcommas(self):
      # Commas inside fields should be correctly escaped when saving as CSV.
      df = DataFrame({"A": [1, 2, 3], "B": ["5,6", "7,8", "9,0"]})
  
      with tm.ensure_clean("__tmp_to_csv_withcommas__.csv") as path:
          df.to_csv(path)
          df2 = self.read_csv(path)
          tm.assert_frame_equal(df2, df)
  
imports: import csv
  from io import StringIO
  import os
  import numpy
  import pytest
  from pandas.errors import ParserError
  import pandas
  from pandas import DataFrame, Index, MultiIndex, NaT, Series, Timestamp, date_range, period_range, read_csv, to_datetime
  import pandas._testing
  import pandas.core.common
  from pandas.io.common import get_handle
label_desc: Use image node_id 26 for calling the TestDataFrameToCSV obj's underlying member method code with example usage: obj.test_to_csv_withcommas() without return types