title: How can we pick 3D points from point cloud data (from a .PCD file) using python?
body: <p>I have a .pcd file that I need to visualize and pick points from the file.</p>
  
  <p>I am using:</p>
  
  <ul>
  <li>Python 3.6 </li>
  <li>open3D</li>
  <li>pcl</li>
  </ul>
  
  <pre><code>import numpy as np
  from open3d import *    
  
  def main():
      pcd = read_point_cloud("C:/Users/rsr5le/Desktop/m_data_2018_11_19__15_58_08.pcd") # Read the point cloud
      draw_geometries([pcd]) # Visualize the point cloud     
  
  
  if __name__ == "__main__":
      main()
  </code></pre>
  
  <p>xyz is the point that I need to pick in the file.</p>