Get lists of coordinates from OpenCV contours in Python
<p>I am looking for a way to retrieve lists of coordinates from contours generated by OpenCV.</p>

<p>For example, if I have an OpenCV contour:</p>

<pre><code>cnt = [[[272 271]] 
       [[271 272]]
       [[270 272]]
       [[269 272]]
       [[268 272]]]
</code></pre>

<p>How to create list of contours x coordinates:</p>

<pre><code>x = [273, 271, 270, 269, 268]
</code></pre>