如何在定义全局方法时从继承的类中动态选择子类

这是我第一次真正深入Python类,所以请原谅对术语的任何误用。

Factory Pattern 基于用户提供的URL动态选择子类的方法。以下是我的设置:

import requests
from bs4 import BeautifulSoup as BS

class Templates(object):
    def __init__(self, url):
        self.headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:54.0) Gecko/20100101 Firefox/54.0'}
        self.url = url

    def url(self):
        return self.url

    def response(self):
        return self.response

    def text(self):
        return self.text

    def dom(self):
        return self.dom

    @staticmethod
    def get_template(url):
        headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:54.0) Gecko/20100101 Firefox/54.0'}
        response = requests.get(url, headers=headers)
        text = response.text
        if 'Website by Dealer.com' in text:
            return Dealer(url)
        else:
            return None

class Dealer(Templates):
    def __init__(self, url):
        Templates.__init__(self, url)
        self.new_vehicle_url = "{}/new-inventory/index.htm".format(self.url.rstrip('/'))
        self.used_vehicle_url = "{}/used-inventory/index.htm".format(self.url.rstrip('/'))

我想做的是打电话 Templates.get_template(url) This question 使它看起来非常简单,但我在这个过程中遗漏了一些东西,因为我还想在我的 Templates url 到 Template

什么是Pythonic方式来设置它,以使下面的代码能够工作?

template = Templates().get_template(url) # assume returns Dealer()
template.url
# 'http://www.some-website.com'
template.response.status_code
# 200