my script dynamically creates zipfiles as it needs them and stores them in a list of files. 

The contents are stored in a list of lists, so that the script knows which zip to add them to. 

This part of the script works fine. 

However, after creating the archives, my script needs to append the documentation files to each zip; should be easy enough, but it is not working as expected. 

I have resorted to building a file list before adding the files to the zip. When it reaches the final archive, it adds 2 copies of each file in the folder,  any ideas on how to cure this would be appreciated. 

def add_documentation(self, folder):
   docsfolder = file_ops().extend_path(folder, "Documentation")
   relative_path = docsfolder
   templist = []

    for root, folders, files in os.walk(docsfolder):
        for file in files:
            file = os.path.join(root, file)
        

        if not file.endswith(exclusions) and not file in templist:
            templist.append(file)

        for builtfile in builtfiles:
            with ZipFile(builtfile, "a") as zipf:
                if "documentation" in str(docsfolder).casefold():

                        zipf.write(docsfolder, relative_path, zipfile.ZIP_DEFLATED)

                for t in templist:
                    zipf.write(t)

So I found a workaround - sloppy but it works

l = len(builtfiles) - 1

if not builtfile == builtfiles[l]:
    zipf.write(t)