Merge all report ppt files into my main ppt file using Python script

Good day to all. Hope someone can help or guide me. I have 11 power point files in the same folder. 10 of those ppt files are report files. And 1 of those are my main ppt file. I want to create a python script to merge all 10 report ppt files into my main ppt file. However i dont want duplicated slides. Possible to delete first before merge. Very thankful to all of you.