code: def testVisualizeSeveralDynamicsOneCanvasNoCrash(self):
      t1 = [0, 1, 2, 3, 4, 5, 6, 7]
      y1 = [0, 0, 1, 2, 0, 1, 2, 0]
  
      t2 = [0, 1, 2, 3, 4, 5, 6, 7]
      y2 = [
          [0, 0],
          [0, 0],
          [1, 0],
          [2, 1],
          [0, 2],
          [1, 0],
          [2, 1],
          [0, 2],
      ]
  
      visualizer = dynamic_visualizer(1)
      visualizer.append_dynamic(t1, y1)
      visualizer.append_dynamics(t2, y2)
  
file_path: pyclustering/pyclustering/nnet/tests/unit/ut_dynamic_visualizer.py
imports: import unittest
  import matplotlib
  from pyclustering.nnet.dynamic_visualizer import dynamic_visualizer
label_desc: Use image node_id 5 for calling the DynamicVisualizerUnitTest obj's underlying member method code with example usage: obj.testVisualizeSeveralDynamicsOneCanvasNoCrash() without return types