Rename multiple files inside multiple folders

Question

So I have a lot of folders with a certain name. In each folder I have +200 items. The items inside the folders has names like:

CT.34562346.246.dcm
RD.34562346.dc         


        

Answer 1

Split each file name on the . and replace the second item with the file name, then join on .'s again for the new file name. Here's some sample code that demonstrates the concept.

folder_name = ['1', '2']

file_names = ['CT.2345.234.dcm', 'BG.234234.222.dcm', "RA.3342.221.dcm"]


for folder in folder_name:
    new_names = []
    for x in file_names:
        file_name = x.split('.')
        file_name[1] = folder
        back_together = '.'.join(file_name)
        new_names.append(back_together)

    print(new_names)

Output

['CT.1.234.dcm', 'BG.1.222.dcm', 'RA.1.221.dcm']
['CT.2.234.dcm', 'BG.2.222.dcm', 'RA.2.221.dcm']