Rename in Batch [Python]

---

#!/usr/bin/python2.7
# Program:
#   Rename files in current folder in batch.
# Date:
#   2016-04-17
# Usage:
#   cd into the directory
#   input the suffix of your filename
#   bingo!

import os

NewNameSuffix = raw_input("")
Count = 0

CurrentDir = os.getcwd()

FileList = os.listdir(CurrentDir)

for File in FileList:
    if os.path.isfile(File):
        os.rename(File, str(Count)+NewNameSuffix)
        Count = Count + 1