title: ImportError: cannot import name 'metrics' from 'skimage'
body: <p>Here's the part that involves the use of <code>skimage</code> in the code:</p>
  <pre><code>from skimage import metrics
  
  ....
  
  print(metrics.mean_squared_error(gray_frame, canny_img))
  print(metrics.peak_signal_noise_ratio(gray_frame, canny_img))
  
  </code></pre>
  <p>Here's the error:</p>
  <pre><code>
  C:\Users\user\Desktop&gt;python cannyopencv2.py
  Traceback (most recent call last):
    File &quot;cannyopencv2.py&quot;, line 6, in &lt;module&gt;
      from skimage import metrics
  ImportError: cannot import name 'metrics' from 'skimage' (C:\ProgramData\Anaconda3\lib\site-packages\skimage\__init__.py)
  
  </code></pre>
  <p>Please help me get rid of it.</p>