#encoding: utf-8
from selenium import webdriver
from selenium.webdriver.support.ui import Select,WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC
from lxml import etree
import time
import re
import csv
class LagouSpider(object):
# chromedriver的绝对路径
driver_path ='/Users/mac126/chromedriver'
def __init__(self):
# 初始化一个driver，并且指定chromedriver的路径
self.driver = webdriver.Chrome(executable_path=self.driver_path)
self.positions = []
self.fp = open('lagou.csv','a',encoding='utf-8',newline='')
self.writer = csv.DictWriter(self.fp,['title','salary','city','work_years','education',"company_website",'desc','acquire','origin_url'])
self.writer.writeheader()
def run(self):
#运行
url = 'https://www.lagou.com/jobs/list_python?labelWords=&fromSearch=true&suginput='#路径
self.driver.get(url)#获取路径
while True:#死循环
WebDriverWait(driver=self.driver,timeout=10).until(
EC.presence_of_element_located((By.XPATH,"//span[contains(@class,'pager_next')]"))
)
resource = self.driver.page_source
self.parse_list_page(resource)
next_btn = self.driver.find_element_by_xpath("//span[contains(@class,'pager_next')]")
if "pager_next_disabled" in next_btn.get_attribute('class'):
break
next_btn.click()
time.sleep(1)
def parse_list_page(self,resource):
html = etree.HTML(resource)
links = html.xpath("//a[@class='position_link']/@href")
for link in links:
self.parse_detail_page(link)
time.sleep(1)
def parse_detail_page(self,url):
self.driver.execute_script("window.open('"+url+"')")
self.driver.switch_to.window(self.driver.window_handles[1])
WebDriverWait(self.driver,timeout=10).until(
EC.presence_of_element_located((By.XPATH,"//dd[@class='job_bt']"))
)
resource = self.driver.page_source
html = etree.HTML(resource)
title = html.xpath("//span[@class='name']/text()")[0]
company = html.xpath("//h2[@class='fl']/text()")[0].strip()
job_request_span = html.xpath("//dd[@class='job_request']//span")
salary = job_request_span[0].xpath(".//text()")[0]
salary = salary.strip()
city = job_request_span[1].xpath(".//text()")[0]
city = re.sub(r"[/\s]","",city)
work_years = job_request_span[2].xpath(".//text()")[0]
work_years = re.sub(r"[/\s]","",work_years)
education = job_request_span[3].xpath(".//text()")[0]
education = re.sub(r"[/\s]","",education)
company_website = html.xpath("//ul[@class='c_feature']/li[last()]/a/@href")[0]
position_desc = "".join(html.xpath("//dd[@class='job_bt']/div//text()"))
position = {
'title': title,
'city': city,
'salary': salary,
'company': company,
'company_website': company_website,
'education': education,
'work_years': work_years,
'desc': position_desc,
'origin_url': url
}
self.driver.close()
self.driver.switch_to.window(self.driver.window_handles[0])
self.write_position(position)
def write_position(self,position):
if len(self.positions) >= 100:
self.writer.writerows(self.positions)
self.positions.clear()
self.positions.append(position)
print(position)
def main():
spider = LagouSpider()
spider.run()
if __name__ == '__main__':
main()
