python如何覆盖start_requests方法

import scrapy
 
 
class Git1Spider(scrapy.Spider):
    name = 'git1'
    allowed_domains = ['github.com']
    start_urls = ['https://github.com/GitLqr']
 
    def start_requests(self):
        """
        重写start_requests，发送携带cookies的Request。
        默认start_requests只是普通的get请求，不会携带自定义的头信息
        """
        url = self.start_urls[0]
 
        temp = '_octo=GH1.1.1045146750.1615451260; _device_id=cd8d64981fcb3fd4ba7f587873e97804'
        # 把cookies字符串转成字典
        cookies = {data.split('=')[0]: data.split('=')[-1] for data in temp.split('; ')}
 
        yield scrapy.Request(
            url=url,
            callback=self.parse,
            cookies=cookies
        )
 
    def parse(self, response):
        print(response.xpath('/html/head/title/text()').extract_first())