code: def setUp(self):
      data = self.DATA
      if "b" in self.WRITEMODE:
          data = data.encode("ascii")
      with self.open(os_helper.TESTFN, self.WRITEMODE) as fp:
          fp.write(data)
  
imports: import io
  import _pyio
  import unittest
  import os
  import sys
  from test.support import os_helper
label_desc: Use image node_id 1 for calling the TestGenericUnivNewlines obj's underlying member method code with example usage: obj.setUp() without return types