code: def _random_color(self, maximum=255):
      idx = np.random.randint(0, len(_COLORS))
      ret = _COLORS[idx] * maximum
      if not self.rgb:
          ret = ret[::-1]
      return ret
  
imports: import colorsys
  import io
  import matplotlib
  import matplotlib.colors
  import matplotlib.figure
  import numpy
  import torch
  from matplotlib.backends.backend_agg import FigureCanvasAgg
  import cv2
  from utils import img_tensorize
label_desc: Use image node_id 9 for calling the SingleImageViz obj's underlying member method code with example usage: obj._random_color(maximum) and returns: ret