code: def test__limit_rational_float(self):
      from PIL.TiffImagePlugin import _limit_rational
  
      value = 22.3
      ret = _limit_rational(value, 65536)
      assert ret == (223, 10)
  
imports: import os
  from io import BytesIO
  import pytest
  from PIL import Image, ImageFile, TiffImagePlugin
  from PIL.TiffImagePlugin import RESOLUTION_UNIT, X_RESOLUTION, Y_RESOLUTION
  from .helper import assert_image_equal, assert_image_equal_tofile, assert_image_similar, assert_image_similar_tofile, hopper, is_pypy, is_win32
label_desc: Use image node_id 43 for calling the TestFileTiff obj's underlying member method code with example usage: obj.test__limit_rational_float() without return types