Find valid redirects (Scrapy)

spider.py

import scrapy


class ImprensaOficialSpider(scrapy.Spider):
    start_urls = ["http://www.imprensaoficial.org/acesso.htm"]
    # example http://pmameliarodriguesba.imprensaoficial.org/
    name = "imprensa_oficial"
    TERRITORY_ID = None
    handle_httpstatus_list = [301]

    def parse(self, response):
        # find cities
        cities = response.css("option::attr(value)").extract()
        for city in cities:
            yield scrapy.Request(
                f"http://pm{city.replace('.', '')}.imprensaoficial.org",
                callback=self.find_cities,
                dont_filter=True,
                meta={"city": city}
            )

    def find_cities(self, response):
        print(f"------------------> {response.status} {response.url}")
        if response.status == 301:
            yield {"url": response.url}