title: show_img() function not working in python
body: <pre><code>image = imread(r"sampleimage.jpg")
  show_img(image)
  </code></pre>
  
  <hr>
  
  <pre><code>NameError: name 'show_img' is not defined.
  </code></pre>
  
  <p>Please suggest me why it is happening?</p>