code: def _test_float_conversion(im):
      orig = im.getpixel((5, 5))
      converted = im.convert("F").getpixel((5, 5))
      assert orig == converted
  
imports: from __future__ import annotations
  import pytest
  from PIL import Image
  from .helper import assert_image, assert_image_equal, assert_image_similar, hopper
label_desc: Use image node_id 4 for calling a global function with example usage: _test_float_conversion(im) without return types