renameFiles.py

import os
import csv
from datetime import datetime
import time
import argparse

parser = argparse.ArgumentParser()
parser.add_argument('-d', '--directory', help='the directory of the files to \
be renamed. optional - if not provided, the script will ask for input')
parser.add_argument('-f', '--fileNameCSV', help='the CSV file of name changes. \
optional - if not provided, the script will ask for input')
parser.add_argument('-m', '--makeChanges', help='Enter "true" to if the script \
should actually rename the files (otherwise, it will only create a log of the \
expected file name changes). optional - if not provided, the script will to \
"false"')
args = parser.parse_args()

if args.directory:
    directory = args.directory
else:
    directory = input('Enter the directory of the files to be renamed: ')
if args.fileNameCSV:
    fileNameCSV = args.fileNameCSV
else:
    fileNameCSV = input('Enter the CSV file of name changes \
    (including \'.csv\'): ')
if args.makeChanges:
    makeChanges = args.makeChanges
else:
    makeChanges = input('Enter "true" to if the script should actually rename \
    the files (otherwise, it will only create a log of the expected file name \
    changes): ')

startTime = time.time()
f = csv.writer(open('renameLog' + datetime.now().strftime('%Y-%m-%d %H.%M.%S')
               + '.csv', 'w'))
f.writerow(['oldFilename'] + ['newFilename'])
for root, dirs, files in os.walk(directory, topdown=True):
    for file in files:
        with open(fileNameCSV) as csvfile:
            reader = csv.DictReader(csvfile)
            for row in reader:
                oldFilename = row['file']
                newFilename = row['newFile']
                if file == oldFilename:
                    print(oldFilename)
                    oldPath = os.path.join(root, file)
                    newPath = os.path.join(root, newFilename)
                    f.writerow([oldPath] + [newPath])
                    if makeChanges == 'true':
                        os.rename(oldPath, newPath)
                    else:
                        print('log of expected file name changes created only, \
                        no files renamed')

elapsedTime = time.time() - startTime
m, s = divmod(elapsedTime, 60)
h, m = divmod(m, 60)
print('Total script run time: ', '%d:%02d:%02d' % (h, m, s))