rename files according to its symlink

rename.py

import os
import argparse
parser = argparse.ArgumentParser(description='Rename files to its symlink')
parser.add_argument('--dir',default=None, type=str)
parser.add_argument('--file', default=None ,type=str)
parser.add_argument('--files', default=None ,nargs='*')
args = parser.parse_args()
runForDir = False
runForFile = False
runForMultipleFiles = False

filePath=None
folderPath=None
multiplefiles=None

print (args.dir)
print (args.file)
print (args.files)

if args.dir != None:
    runForDir=True
if args.file != None:
    runForFile=True
if args.files != None:
    runForMultipleFiles = True

if runForDir == True:
    folderPath=args.dir
    files = os.listdir(folderPath)
    for index, filename in enumerate(files):
        if(os.path.islink(file) == True):
            symlink = filename
            original = os.path.realpath(filename)
            os.unlink(symlink)
            os.rename(original,symlink)
            print(os.path.realpath(symlink))

if runForMultipleFiles == True:
    multiplefiles = args.files
    for index, filename in enumerate(multiplefiles):
        if(os.path.islink(filename) == True):
            symlink = filename
            original = os.path.realpath(symlink)
            print ("Symlink:{}".format(symlink))
            print ("Original:{}".format(os.path.realpath(original)))
            os.unlink(symlink)
            os.rename(original,symlink)
            print(os.path.realpath(symlink))

if runForFile == True:
    filename=args.file
    if (os.path.islink(filename)):
        symlink = filename
        original = os.path.realpath(filename)
        os.unlink(symlink)
        os.rename(original,symlink)
        print(os.path.realpath(symlink))