code: def test_guess_datetime_format_no_padding(
      string, fmt, dayfirst, warning
  ):
      # see gh-11142
      msg = (
          rf"Parsing dates in {fmt} format when dayfirst=False \(the default\) "
          "was specified. "
          "Pass `dayfirst=True` or specify a format to silence this warning."
      )
      with tm.assert_produces_warning(warning, match=msg):
          result = parsing.guess_datetime_format(
              string, dayfirst=dayfirst
          )
      assert result == fmt
  
imports: from datetime import datetime
  import re
  from dateutil.parser import parse
  from dateutil.tz import tzlocal
  from hypothesis import given
  import numpy
  import pytest
  from pandas._libs.tslibs import parsing, strptime
  from pandas._libs.tslibs.parsing import parse_datetime_string_with_reso
  from pandas.compat import ISMUSL, is_platform_windows
  import pandas.util._test_decorators
  import pandas._testing
  from pandas._testing._hypothesis import DATETIME_NO_TZ
label_desc: Use image node_id 17 for calling a global function with example usage: test_guess_datetime_format_no_padding(string, fmt, dayfirst, warning) without return types