title: ModuleNotFoundError: No module named 'cycler'
body: <p>when I use matplotlib on pycharm without using 'cycler', it shows the above type of error. Could you help? Appreciate!</p>
  
  <pre><code>      import cv2 as cv
        import numpy as np
        from matplotlib import pyplot as plt
  
        img = cv.imread('lena.jpg',-1)
        cv.imshow('image',img)
        img =cv.cvtColor(img, cv.COLOR_BGR2RGB)
  
        plt.imshow(img)
        plt.show(0)
  
        cv.waitKey(0)
        cv.destroyAllWindows()
  </code></pre>