title: Python - Display 3D Point Cloud
body: <p>I have a .PLY file that contains a 3D Point Cloud: I want to plot it and visualize it in Python. 
  The .PLY file contains ONLY vertex and NOT faces.</p>
  
  <p><strong>Could you indicate me a simple Python library that will take care of plotting the 3D Point Cloud?</strong></p>
  
  <p>It is important to remark that I am not interested in plotting a Mesh, but just the Point Cloud. </p>