code: def test_empty_str_methods(any_string_dtype):
      empty_str = empty = Series(dtype=any_string_dtype)
      if any_string_dtype in object_pyarrow_numpy:
          empty_int = Series(dtype="int64")
          empty_bool = Series(dtype=bool)
      else:
          empty_int = Series(dtype="Int64")
          empty_bool = Series(dtype="boolean")
      empty_object = Series(dtype=object)
      empty_bytes = Series(dtype=object)
      empty_df = DataFrame()
  
      # GH7241
      # (extract) on empty series
  
      tm.assert_series_equal(empty_str, empty.str.cat(empty))
      assert "" == empty.str.cat()
      tm.assert_series_equal(empty_str, empty.str.title())
      tm.assert_series_equal(empty_int, empty.str.count("a"))
      tm.assert_series_equal(empty_bool, empty.str.contains("a"))
      tm.assert_series_equal(empty_bool, empty.str.startswith("a"))
      tm.assert_series_equal(empty_bool, empty.str.endswith("a"))
      tm.assert_series_equal(empty_str, empty.str.lower())
      tm.assert_series_equal(empty_str, empty.str.upper())
      tm.assert_series_equal(empty_str, empty.str.replace("a", "b"))
      tm.assert_series_equal(empty_str, empty.str.repeat(3))
      tm.assert_series_equal(empty_bool, empty.str.match("^a"))
      tm.assert_frame_equal(
          DataFrame(columns=[0], dtype=any_string_dtype),
          empty.str.extract("()", expand=True),
      )
      tm.assert_frame_equal(
          DataFrame(columns=[0, 1], dtype=any_string_dtype),
          empty.str.extract("()()", expand=True),
      )
      tm.assert_series_equal(
          empty_str, empty.str.extract("()", expand=False)
      )
      tm.assert_frame_equal(
          DataFrame(columns=[0, 1], dtype=any_string_dtype),
          empty.str.extract("()()", expand=False),
      )
      tm.assert_frame_equal(
          empty_df.set_axis([], axis=1), empty.str.get_dummies()
      )
      tm.assert_series_equal(empty_str, empty_str.str.join(""))
      tm.assert_series_equal(empty_int, empty.str.len())
      tm.assert_series_equal(empty_object, empty_str.str.findall("a"))
      tm.assert_series_equal(empty_int, empty.str.find("a"))
      tm.assert_series_equal(empty_int, empty.str.rfind("a"))
      tm.assert_series_equal(empty_str, empty.str.pad(42))
      tm.assert_series_equal(empty_str, empty.str.center(42))
      tm.assert_series_equal(empty_object, empty.str.split("a"))
      tm.assert_series_equal(empty_object, empty.str.rsplit("a"))
      tm.assert_series_equal(
          empty_object, empty.str.partition("a", expand=False)
      )
      tm.assert_frame_equal(empty_df, empty.str.partition("a"))
      tm.assert_series_equal(
          empty_object, empty.str.rpartition("a", expand=False)
      )
      tm.assert_frame_equal(empty_df, empty.str.rpartition("a"))
      tm.assert_series_equal(empty_str, empty.str.slice(stop=1))
      tm.assert_series_equal(empty_str, empty.str.slice(step=1))
      tm.assert_series_equal(empty_str, empty.str.strip())
      tm.assert_series_equal(empty_str, empty.str.lstrip())
      tm.assert_series_equal(empty_str, empty.str.rstrip())
      tm.assert_series_equal(empty_str, empty.str.wrap(42))
      tm.assert_series_equal(empty_str, empty.str.get(0))
      tm.assert_series_equal(
          empty_object, empty_bytes.str.decode("ascii")
      )
      tm.assert_series_equal(empty_bytes, empty.str.encode("ascii"))
      # ismethods should always return boolean (GH 29624)
      tm.assert_series_equal(empty_bool, empty.str.isalnum())
      tm.assert_series_equal(empty_bool, empty.str.isalpha())
      tm.assert_series_equal(empty_bool, empty.str.isdigit())
      tm.assert_series_equal(empty_bool, empty.str.isspace())
      tm.assert_series_equal(empty_bool, empty.str.islower())
      tm.assert_series_equal(empty_bool, empty.str.isupper())
      tm.assert_series_equal(empty_bool, empty.str.istitle())
      tm.assert_series_equal(empty_bool, empty.str.isnumeric())
      tm.assert_series_equal(empty_bool, empty.str.isdecimal())
      tm.assert_series_equal(empty_str, empty.str.capitalize())
      tm.assert_series_equal(empty_str, empty.str.swapcase())
      tm.assert_series_equal(empty_str, empty.str.normalize("NFC"))
  
      table = str.maketrans("a", "b")
      tm.assert_series_equal(empty_str, empty.str.translate(table))
  
imports: from datetime import datetime, timedelta
  import numpy
  import pytest
  from pandas import DataFrame, Index, MultiIndex, Series
  import pandas._testing
  from pandas.core.strings.accessor import StringMethods
  from pandas.tests.strings import object_pyarrow_numpy
label_desc: Use image node_id 8 for calling a global function with example usage: test_empty_str_methods(any_string_dtype) without return types