python script to rename pdf files from "dd-mm-yyyy Filename.pdf" to "yyyy-mm-dd Filename.pdf"

rename.py

# to rename pdf files from "dd-mm-yyyy Filename.pdf" to "yyyy-mm-dd Filename.pdf"
import os

def main(): 
  
    for count, fullfilename in enumerate(os.listdir(".")): 
        file_name, file_extension = os.path.splitext(fullfilename)
        if file_extension == ".pdf":
            date = fullfilename[0:10].split('-')
            newFilename = date[2]+"-"+date[1]+"-"+date[0]+fullfilename[10:]
            print fullfilename+" -> "+newFilename
            os.rename(fullfilename, newFilename)

main()