code: def test_slope():
      """Test the slope measurement"""
      numpy.random.seed(0)
      image1 = numpy.random.uniform(size=(10, 10)).astype(numpy.float32)
      image2 = image1 * 0.5
      i1 = cellprofiler_core.image.Image(image1)
      i2 = cellprofiler_core.image.Image(image2)
      workspace, module = make_workspace(i1, i2)
      module.run(workspace)
      m = workspace.measurements
      mi = module.get_measurement_images(
          None, "Image", "Correlation", "Slope"
      )
      slope = m.get_current_measurement(
          "Image", "Correlation_Slope_%s" % mi[0]
      )
      if mi[0] == "%s_%s" % (IMAGE1_NAME, IMAGE2_NAME):
          assert round(abs(slope - 0.5), 5) == 0
      else:
          assert round(abs(slope - 2), 7) == 0
  
imports: import numpy
  import six.moves
  import cellprofiler_core.image
  import cellprofiler_core.measurement
  from cellprofiler_core.constants.measurement import COLTYPE_FLOAT
  import cellprofiler.modules.measurecolocalization
  import cellprofiler_core.object
  import cellprofiler_core.pipeline
  import cellprofiler_core.workspace
  import tests.frontend.modules
label_desc: Use image node_id 12 for calling a global function with example usage: test_slope() without return types