Create a base64 thumbnail from image URL (Python)

img2base64.py

import numpy as np
import base64
import urllib
from PIL import Image

#Convert image to base64 thumbnail
def img2base64(img_link):
  with open("/tmp/img_file.jpg", "wb") as f:
      f.write(urllib.request.urlopen(img_link).read())
  tmp_img = np.asarray(Image.open("/tmp/img_file.jpg"))
  tmp_thumb = tmp_img.resize((250, 250), Image.ANTIALIAS)
  tmp_thumb.save("/tmp/thumb_file.jpg")
  with open("/tmp/thumb_file.jpg", "rb") as img:
    thumb_string = base64.b64encode(img.read())
  base64out = "data:image/jpeg;base64," + str(thumb_string)[2:-1]
  return(base64out)