Batch rename exam names

rename_exams.py

import os

# Batch rename all files on the form:
# exam_211028.pdf -> exam_2021-10-28.pdf

filePath = './Exams/'

for fileName in sorted(os.listdir(filePath)):
    prefix, after = fileName.split('_')
    date, ext = after.split('.')
    newDate = '20' + '-'.join(date[i:i+2] for i in range(0, len(date), 2))
    newName = prefix + '_' + newDate + '.' + ext
    # print(filePath + newName)
    os.rename(filePath + fileName, filePath + newName)