acl2

import os, sys
import win32file
import win32security
import ntsecuritycon as con
import time

def copyACL(file1, file2):
    sd = win32security.GetFileSecurity(file1, win32security.DACL_SECURITY_INFORMATION)
    dacl = sd.GetSecurityDescriptorDacl()  # instead of dacl = win32security.ACL()

    win32security.SetFileSecurity(file2, win32security.DACL_SECURITY_INFORMATION, sd)

time1 = time.time()

for dirpath, dirnames, filenames in os.walk("C:/Users/Yorick/Downloads/Test"):
    print(dirpath)
    dirpath2 = dirpath.replace('Test', 'Test2')
    copyACL(dirpath, dirpath2)
    for dirname in dirnames:
        print(dirname)
        filename = os.path.join(dirpath, dirname)
        filename2 = filename.replace('Test', 'Test2')
        copyACL(filename, filename2)


    for filename in filenames:
        print(filename)
        filename = os.path.join(dirpath, filename)
        filename2 = filename.replace('Test', 'Test2')
        copyACL(filename, filename2)

time2 = time.time()
print('--------------------')
print('Finished in '+str(time2 - time1)+'s')