code: def test_uint16():
      Format = QtGui.QImage.Format
      dtype = np.uint16
      w, h = 192, 108
      lo, hi = 100, 10000
      lut_none = None
  
      lut_mono1 = np.random.randint(256, size=256, dtype=np.uint8)
      lut_mono2 = np.random.randint(256, size=(256, 1), dtype=np.uint8)
      lut_rgb = np.random.randint(256, size=(256, 3), dtype=np.uint8)
      lut_rgba = np.random.randint(256, size=(256, 4), dtype=np.uint8)
  
      # lut with less than 256 entries
      lut_mono1_s = np.random.randint(256, size=255, dtype=np.uint8)
      lut_mono2_s = np.random.randint(
          256, size=(255, 1), dtype=np.uint8
      )
      lut_rgb_s = np.random.randint(256, size=(255, 3), dtype=np.uint8)
      lut_rgba_s = np.random.randint(256, size=(255, 4), dtype=np.uint8)
  
      # lut with more than 256 entries
      lut_mono1_l = np.random.randint(256, size=257, dtype=np.uint8)
      lut_mono2_l = np.random.randint(
          256, size=(257, 1), dtype=np.uint8
      )
      lut_rgb_l = np.random.randint(256, size=(257, 3), dtype=np.uint8)
      lut_rgba_l = np.random.randint(256, size=(257, 4), dtype=np.uint8)
  
      levels = None
      try:
          fmt_gray16 = Format.Format_Grayscale16
      except AttributeError:
          fmt_gray16 = Format.Format_ARGB32
      check_format((h, w), dtype, levels, lut_none, fmt_gray16)
      check_format(
          (h, w, 3), dtype, levels, lut_none, Format.Format_RGB888
      )
      check_format(
          (h, w, 4), dtype, levels, lut_none, Format.Format_RGBA64
      )
  
      levels = [lo, hi]
      check_format(
          (h, w), dtype, levels, lut_none, Format.Format_Grayscale8
      )
      levels = None
      check_format(
          (h, w), dtype, levels, lut_mono1, Format.Format_Indexed8
      )
      check_format(
          (h, w), dtype, levels, lut_mono2, Format.Format_Indexed8
      )
      check_format(
          (h, w), dtype, levels, lut_rgb, Format.Format_Indexed8
      )
      check_format(
          (h, w), dtype, levels, lut_rgba, Format.Format_Indexed8
      )
  
      check_format(
          (h, w), dtype, levels, lut_mono1_s, Format.Format_Indexed8
      )
      check_format(
          (h, w), dtype, levels, lut_mono2_s, Format.Format_Indexed8
      )
      check_format(
          (h, w), dtype, levels, lut_rgb_s, Format.Format_Indexed8
      )
      check_format(
          (h, w), dtype, levels, lut_rgba_s, Format.Format_Indexed8
      )
  
      check_format(
          (h, w), dtype, levels, lut_mono1_l, Format.Format_Grayscale8
      )
      check_format(
          (h, w), dtype, levels, lut_mono2_l, Format.Format_Grayscale8
      )
      check_format(
          (h, w), dtype, levels, lut_rgb_l, Format.Format_RGBX8888
      )
      check_format(
          (h, w), dtype, levels, lut_rgba_l, Format.Format_RGBA8888
      )
  
      levels = [lo, hi]
      check_format(
          (h, w, 3), dtype, levels, lut_none, Format.Format_RGB888
      )
  
imports: import numpy
  import pyqtgraph
  from pyqtgraph.Qt import QtGui
label_desc: Use image node_id 3 for calling a global function with example usage: test_uint16() without return types