title: How to implement a kernel of size 1 in a Gaussian filter in opencv?
body: <p>I'm trying to create a 1 pixel kernel:</p>
  
  <pre><code>x = cv2.getGaussianKernel(1, 2)
  </code></pre>
  
  <p>And I use it in a gaussian filter:</p>
  
  <pre><code>blur = cv2.GaussianBlur(img, x, 0)
  </code></pre>
  
  <p>As a result, an error occurs:</p>
  
  <pre><code>SystemError: new style getargs format but argument is not a tuple
  </code></pre>
  
  <p>How to fix this error?</p>