qooba

import re
import uuid
import base64

def uuid_url64():
    """Returns a unique, 16 byte, URL safe ID by combining UUID and Base64
    """
    rv = base64.b64encode(uuid.uuid4().bytes).decode('utf-8')
    return re.sub(r'[\=\+\/]', lambda m: {'+': '-', '/': '_', '=': ''}[m.group(0)], rv)