爬虫第六课---scrapy（二）案例2，爬取腾讯招聘

'''
1.
shell对象和selector对象
scrapy shell就是一个交互式的终端
作用：可以很好的调试
启动：scrapy shell url

如果url有参数，用引号把url包起来

2.选择器
selector
xpath
extract：返回unicode字符串
css
re
'''

废话不多说，直接上代码，然后解释。

spider代码

# -*- coding: utf-8 -*-
import scrapy
from ..items import TencentItem


class TencentSpider(scrapy.Spider):
    name = 'tencent'
    # allowed_domains = ['https://hr.tencent.com/position.php?&start=0#a']
    start_urls = ['https://hr.tencent.com/position.php?&start=0#a']
    base_url = 'https://hr.tencent.com/'

    def parse(self, response):
        names = response.xpath('//tr[@class="even"]/td[1]/a/text() | //tr[@class="odd"]/td[1]/a/text()').extract()
        types = response.xpath('//tr[@cl