selenium爬取拉勾网python职位信息

直接上代码，主要爬取的是广州的python职位信息

from selenium import webdriver
import time
from lxml import etree
import re
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By
import xlwt
import  csv

class LagouSpider(object):
    driver_path = r"H:\python\chromedriver.exe"
    chromeOptions = webdriver.ChromeOptions()
    chromeOptions.add_argument("service_args = ['–ignore - ssl - errors = true', '–ssl - protocol = TLSv1']")  # Python2/3
    chromeOptions.add_experimental_option('excludeSwitches', ['enable - automation'])
    # 设置代理
    chromeOptions.add_argument("--proxy-server=http://47.100.7.167:8989 ")
    def __init__(self):
        self.driver = webdriver.Chrome(chrome_options=LagouSpider.chromeOptions,executable_path=LagouSpider.driver_path,)
        self.url = 'https://www.lagou.com/jobs/list_python/p-city_213?px=default#filterBox'
        self.positions = []

    def run(self):
        self.driver.get(self.url)
        while True:
            source = self.driver.page_source
            self.parse_list_page(source)
            if re.search(r'action="next" class="pager_next pager_next_disabled"', self.driver.page_source):
                break
            self.next_page()  # 点击进入下一页
        self.driver.quit()  # 将浏览器退出
        self.write_to_csv()  # 将获取的数据写入文件

    def parse_list_page(self,source):
        html = etree.HTML(source)
        links = html.xpath("//a[@class='position_link']/@href")
        self.driver.execute_script("window.open()")  # 开启新的标签页
        self.driver.switch_to.window(self.driver.window_handles[1])  # 切换到新的标签页
        for url in links:  # 遍历职位的详情页
            self.driver.get(url)  # 打开职位的详情页
            html = etree.HTML(self.driver.page_source)  # 解析详情页
            title = html.xpath('//h4[@class="company"]/text()')[0]
            job_request_span = html.xpath('//dd[@class ="job_request"]/h3/span/text()')
            
            salary = job_request_span[0]
            salary = re.sub(r"[\s/]","",salary) 
            city = job_request_span[1]
            city = re.sub(r"[\s/]","",city)            
            work_year = job_request_span[2]
            work_year = re.sub(r"[\s/]", "", work_year)
            education = job_request_span[3]
            education = re.sub(r"[\s/]", "", education)
            desc = ''.join(html.xpath('//dd[@class="job_bt"]//text()')).strip()
            company = html.xpath('//em[@class="fl-cn"]/text()')[0].strip()
            positon = {
                'title': title,
                'company': company,
                'salary': salary,
                'city': city,
                'work_year': work_year,
                'education': education,
                'desc': desc,
            }
            self.positions.append(positon)
            print(positon)
            time.sleep(5)
        self.driver.close()  # 关闭标签页
        self.driver.switch_to.window(self.driver.window_handles[0])  # 切换页面


    def next_page(self):
        # 找到下一页标签
        element = WebDriverWait(self.driver, 10).until(
            EC.presence_of_element_located((By.CLASS_NAME, "pager_next")))
        element.click()  # 点击下一页标签
        time.sleep(1)

    def write_to_csv(self):  # 写入文件
        header = ['title', 'company', 'desc', 'salary', 'work_year', 'education']
        with open('positons.csv', 'w', newline='', encoding='utf-8') as fp:
            write = csv.DictWriter(fp, header)
            write.writeheader()
            write.writerows(self.positions)

if __name__ == '__main__':
    spider = LagouSpider()
    spider.run()