Ply and Pcd are formats for storing point clouds. They are basically a list of 3d points (x y z) with a slightly different format. This is an example for a ply Format: ply format ascii 1.0 comment VCGLIB generated element vertex 9 property float x property float y property float z property uchar red property uchar green property uchar blue property uchar alpha element face 0 property list uchar int vertex_indices end_header 169.345 0.00190678 -356.222 128 138 80 255 170.668 0.00202459 -355.459 58 36 16 255 170.6 0.00285877 -355.877 59 46 45 255 170.307 0.00326565 -354.98 149 107 81 255 170.581 0.00329066 -355.646 61 38 28 255 170.51 0.00389251 -355.671 70 48 44 255 170.198 0.00511375 -354.959 92 57 55 255 170.558 0.00516258 -355.87 76 63 62 255 170.709 0.00550342 -355.155 100 79 55 255 Your task is: Look up online what is the format to PCD files. Using Python load the attached Ply file . Convert the format to Pcd and save it. Try to make is as efficient as you can. Try to keep the code as clean as possible so it will be read able. To check that your Pcd file yours you can download Cloud compare from: http://www.cloudcompare.org/release/