code: def test_replace_compiled_regex_unicode(any_string_dtype):
      ser = Series(
          [b"abcd,\xc3\xa0".decode("utf-8")], dtype=any_string_dtype
      )
      expected = Series(
          [b"abcd, \xc3\xa0".decode("utf-8")], dtype=any_string_dtype
      )
      pat = re.compile(r"(?<=\w),(?=\w)", flags=re.UNICODE)
      with tm.maybe_produces_warning(
          PerformanceWarning, using_pyarrow(any_string_dtype)
      ):
          result = ser.str.replace(pat, ", ", regex=True)
      tm.assert_series_equal(result, expected)
  
imports: from datetime import datetime
  import re
  import numpy
  import pytest
  from pandas.errors import PerformanceWarning
  import pandas.util._test_decorators
  import pandas
  from pandas import Series, _testing
  from pandas.tests.strings import _convert_na_value, object_pyarrow_numpy
label_desc: Use image node_id 22 for calling a global function with example usage: test_replace_compiled_regex_unicode(any_string_dtype) without return types