code: def test_zfill_with_leading_sign():
      value = Series(["-cat", "-1", "+dog"])
      expected = Series(["-0cat", "-0001", "+0dog"])
      tm.assert_series_equal(value.str.zfill(5), 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 46 for calling a global function with example usage: test_zfill_with_leading_sign() without return types