code: def test_repeat_with_null(any_string_dtype, arg, repeat):
      # GH: 31632
      ser = Series(["a", arg], dtype=any_string_dtype)
      result = ser.str.repeat([3, repeat])
      expected = Series(["aaa", None], dtype=any_string_dtype)
      tm.assert_series_equal(result, expected)
  
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 7 for calling a global function with example usage: test_repeat_with_null(any_string_dtype, arg, repeat) without return types