title: Finding ONLY Unique Coordinates in List
body: <p>I have a list of coordinates like</p>
  
  <pre><code>list_cor = 
      [[4190091.4195999987, 7410226.618699998], 
      [4190033.2124999985, 7410220.0823], 
      [4190033.2124999985, 7410220.0823], 
      [4190035.7005000003, 7410208.670500003], 
      [4190033.2124999985, 7410220.0823], 
      [4190022.768599998, 7410217.844300002]]
  </code></pre>
  
  <p>I need to get only these values:</p>
  
  <pre><code>[[4190091.4195999987, 7410226.618699998], 
  [4190035.7005000003, 7410208.670500003], 
  [4190022.768599998, 7410217.844300002]]
  </code></pre>
  
  <p>Tried <code>numpy.unique()</code> but it adds this item <code>[4190033.2124999985, 7410220.0823]</code>, which I don't need.</p>