code: def test_mixed_types_dates(self):
      # type of dates must be consistent with type of contents
      a = [b"foo\n"]
      b = [b"bar\n"]
      datea = "1 fév"
      dateb = "3 fév"
      self._assert_type_error(
          "all arguments must be bytes, not str ('1 fév')",
          difflib.diff_bytes,
          difflib.unified_diff,
          a,
          b,
          b"a",
          b"b",
          datea,
          dateb,
      )
  
      # if input is str, non-ASCII dates are fine
      a = ["foo\n"]
      b = ["bar\n"]
      list(difflib.unified_diff(a, b, "a", "b", datea, dateb))
  
imports: import difflib
  from test.support import findfile
  import unittest
  import doctest
  import sys
label_desc: Use image node_id 6 for calling the TestBytes obj's underlying member method code with example usage: obj.test_mixed_types_dates() without return types