一、前言

每到年底国债逆回购的利息都会来一波高涨，利息会比银行的T+0的理财产品的利息高，所以可以考虑写个脚本每天定时启动爬取逆回购数据，实时查看利息，然后在利息高位及时去下单。

二、环境搭建

详情请看《python爬虫进阶篇：Scrapy中使用Selenium模拟Firefox火狐浏览器爬取网页信息》

三、代码实现

  • items
class BondSpiderItem(scrapy.Item):# define the fields for your item here like:# name = scrapy.Field()# 股票代码bond_code = scrapy.Field()# 股票名称bond_name = scrapy.Field()# 最新价last_price = scrapy.Field()# 涨跌幅rise_fall_rate = scrapy.Field()# 涨跌额rise_fall_price = scrapy.Field()
  • middlewares
def __init__(self):# ----------------firefox的设置------------------------------- #self.options = firefox_options()def spider_opened(self, spider):spider.logger.info('Spider opened: %s' % spider.name)spider.driver = webdriver.Firefox(options=self.options)# 指定使用的浏览器def process_request(self, request, spider):# Called for each request that goes through the downloader# middleware.# Must either:# - return None: continue processing this request# - or return a Response object# - or return a Request object# - or raise IgnoreRequest: process_exception() methods of# installed downloader middleware will be calledspider.driver.get(request.url)return Nonedef process_response(self, request, response, spider):# Called with the response returned from the downloader.# Must either;# - return a Response object# - return a Request object# - or raise IgnoreRequestresponse_body = spider.driver.page_sourcereturn HtmlResponse(url=request.url, body=response_body, encoding='utf-8', request=request)
  • settings设置
SPIDER_MIDDLEWARES = { 'bond_spider.middlewares.BondSpiderSpiderMiddleware': 543,}DOWNLOADER_MIDDLEWARES = { 'bond_spider.middlewares.BondSpiderDownloaderMiddleware': 543,}ITEM_PIPELINES = { 'bond_spider.pipelines.BondSpiderPipeline': 300,}
  • middlewares中间件
from selenium.webdriver.firefox.options import Options as firefox_optionsspider.driver = webdriver.Firefox(options=firefox_options())# 指定使用的浏览器
  • spider文件
def parse(self, response):# 股票代码bond_code = response.css("table.table_wrapper-table tbody tr td:nth-child(2) a::text").extract()# 股票名称bond_name = response.css("table.table_wrapper-table tbody tr td:nth-child(3) a::text").extract()# 最新价last_price = response.css("table.table_wrapper-table tbody tr td:nth-child(4) span::text").extract()# 涨跌幅rise_fall_rate = response.css("table.table_wrapper-table tbody tr td:nth-child(6) span::text").extract()# 涨跌额rise_fall_price = response.css("table.table_wrapper-table tbody tr td:nth-child(5) span::text").extract()for i in range(len(bond_code)):item = BondSpiderItem()item["bond_code"] = bond_code[i]item["bond_name"] = bond_name[i]item["last_price"] = last_price[i]item["rise_fall_rate"] = rise_fall_rate[i]item["rise_fall_price"] = rise_fall_price[i]yield itemprint()def close(self, spider):spider.driver.quit()
  • pipelines持久化
def __init__(self):self.html = ''self.html = self.html +''self.html = self.html +''%"代码"self.html = self.html +''%"名称"self.html = self.html +''%"最新价"self.html = self.html +''%"涨跌幅"self.html = self.html +''%"涨跌额"self.html = self.html +''defprocess_item(self, item, spider):self.html = self.html +''self.html = self.html +''% item["bond_code"]self.html = self.html +''% item["bond_name"]self.html = self.html +''% item["last_price"]self.html = self.html +''% item["rise_fall_rate"]self.html = self.html +''% item["rise_fall_price"]self.html = self.html +''return itemdefclose_spider(self, spider):self.html = self.html +'
 
 %s   %s   %s   %s   %s   
  
 %s  %s  %s  %s  %s  
  
'self.send_email(self.html)print()def send_email(self, html):# 设置邮箱账号account = "xxx"# 设置邮箱授权码token = "xxx"# 实例化smtp对象，设置邮箱服务器，端口smtp = smtplib.SMTP_SSL('smtp.qq.com', 465)# 登录qq邮箱smtp.login(account, token)# 添加正文，创建简单邮件对象email_content = MIMEText(html, 'html', 'utf-8')# 设置发送者信息email_content['From'] = 'xxx'# 设置接受者信息email_content['To'] = '技术总是日积月累的'# 设置邮件标题email_content['Subject'] = '来自code_space的一封信'# 发送邮件smtp.sendmail(account, 'xxx', email_content.as_string())# 关闭邮箱服务smtp.quit()

四、测试结果