docstr: Grab the scalings from the image 
docstr_tok: ["Grab","the","scalings","from","the","image"]
code: def retrieve_image_scalings(self, image_group, workspace):
      """Grab the scalings from the image"""
  
      result = []
      for image_name in self.images_to_process(image_group, workspace):
          feature = "{}_{}_{}".format(
              C_IMAGE_QUALITY,
              cellprofiler_core.constants.image.C_SCALING,
              image_name,
          )
          value = workspace.image_set.get_image(image_name).scale
          if (
              not value
          ):  # Set to NaN if not defined, such as for derived images
              value = numpy.NaN
          workspace.add_measurement("Image", feature, value)
          result += [["{} scaling".format(image_name), value]]
      return result
  
imports: import itertools
  import logging
  import cellprofiler_core.utilities.image
  import centrosome.cpmorphology
  import centrosome.haralick
  import centrosome.radial_power_spectrum
  import centrosome.threshold
  import centrosome.threshold
  import numpy
  import scipy.linalg.basic
  import scipy.ndimage
  from cellprofiler_core.constants.image import C_SCALING
  from cellprofiler_core.constants.measurement import COLTYPE_FLOAT, EXPERIMENT, MCA_AVAILABLE_POST_RUN
  from cellprofiler_core.constants.module._identify import O_WEIGHTED_VARIANCE, O_ENTROPY, O_FOREGROUND, O_BACKGROUND
  from cellprofiler_core.module import Module
  from cellprofiler_core.preferences import get_headless
  from cellprofiler_core.setting import Divider, HiddenCount, SettingsGroup, Binary, ValidationError
  from cellprofiler_core.setting.choice import Choice
  from cellprofiler_core.setting.do_something import DoSomething, RemoveSettingButton
  from cellprofiler_core.setting.subscriber import ImageListSubscriber
  from cellprofiler_core.setting.text import ImageName, Integer, Float
  from cellprofiler.modules.threshold import O_THREE_CLASS, O_TWO_CLASS
label_desc: Use image node_id 27 for calling the MeasureImageQuality obj's underlying member method code with example usage: obj.retrieve_image_scalings(image_group, workspace) and returns: result