[Python] Extracting EXIF DateTaken as Str when I need it as Date and Time or an Int

Trying to rename family pictures, I want all the photos in this folder to be renamed as

mmdd__00X

So the 20th image on March 23rd should have a file name of

0323__020

A lot of my code comes from other threads on this, I used the code from Python File Creation Date & Rename - Request for Critique for most of it, but found I needed Date Taken (exif data) as opposed to Date Created. Problem is, the EXIF module in Pillow takes the Date Taken tag as a String, but I need it to be an int or a datetime for me to be able to modify. Or can I parse the string to fit my naming format?

import os
import datetime
from PIL import Image

target = input('Enter full directory path: ')
os.chdir(target)
allfiles = os.listdir(target)
counter = 0

def get_date_taken(path):
return Image.open(path)._getexif()[36867]

for filename in allfiles:
t = get_date_taken(filename)
v = datetime.datetime.fromtimestamp(t)
x = v.strftime('%m%d')
y = '{:02d}'.format(counter)
try:
os.rename(filename, x+"__"+y+".jpg")
except FileExistsError:
while True:
try:
counter += 1
y = '{:02d}'.format(counter)
os.rename(filename, x+"__"+y+".jpg")
except FileExistsError:
continue
counter = 0
break


First real program, any help would be appreciated.

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