Python Scrapy登录和抓取多个页面

import scrapy
from scrapy.http import FormRequest

class MySpider(scrapy.Spider):
    name = 'my_spider'
    start_urls = ['http://example.com/login']
    login_data = {
        'username': 'your_username',
        'password': 'your_password'
    }

def start_requests(self):
    yield FormRequest(url='http://example.com/login', formdata=self.login_data, callback=self.after_login)

def after_login(self, response):
    # 在这里可以进行登录后的操作，如判断登录是否成功、保存登录状态等
    if 'Welcome' in response.text:
        self.logger.info('Login successful!')
        # 登录成功后，继续抓取其他页面
        yield scrapy.Request(url='http://example.com/page1', callback=self.parse_page1)
        yield scrapy.Request(url='http://example.com/page2', callback=self.parse_page2)

def parse_page1(self, response):
    # 解析页面1的数据
    pass

def parse_page2(self, response):
    # 解析页面2的数据
    pass