爬取猎聘大数据岗位相关信息--Python

猎聘网站搜索大数据关键字，只能显示100页，爬取这一百页的相关信息，以便做分析。

__author__ = 'Fred Zhao'

import requests
from bs4 import BeautifulSoup
import os
import csv

class JobSearch():

    def __init__(self):
        self.headers = {
            'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.95 Safari/537.36'}
        self.base_url = 'https://www.liepin.com/zhaopin/?ckid=c1a868fa8b83aa5b&fromSearchBtn=2&init=-1&sfrom=click-pc_homepage-centre_searchbox-search_new&degradeFlag=0&key=大数据&headckid=c1a868fa8b83aa5b&d_pageSize=40&siTag=LGV-fc5u_67LtFjetF6ACg~fA9rXquZc5IkJpXC-Ycixw&d_headId=8e7325814e7ed9919787ee3fe85e1c94&d_ckId=8e7325814e7ed9919787ee3fe85e1c94&d_sfrom=search_fp&d_curPage=99&curPage='
        self.base_path = os.path.dirname(__file__)

    def makedir(self, name):
        path = os.path.join(self.base_path, name)
        isExist = os.path.exists(path)
        if not isExist:
            os.makedirs(path)
            print("File has been created.")
        else:
            print('OK!The file is existed. You do not need create a new one.')
        os.chdir(path)

    def request(self, url):
        r = requests.get(url, headers=self.headers)
        return r

    def get_detail(self, page):
        r = self.request(self.base_url + page)
        ul = BeautifulSoup(r.text, 'lxml').find('ul', class_='sojob-list')
        plist = ul.find_all('li')
        self.makedir('job_data')
        rows = []
        for item in plist:
            job_info = item.find('div', class_='sojob-item-main clearfix').find('div', class_='job-info')
            position = job_info.find('h3').get('title')
            print(position)
            job_info_list = job_info.find_all('p')
            job_condition = job_info_list[0].get('title')
            print(job_condition)
            job_time = job_info_list[1].find('time').get('title')
            print(job_time)
            company_info = item.find('div', class_='sojob-item-main clearfix').find('div', class_='company-info')
            company = company_info.find('p', class_='company-name').find('a').get('title')
            print(company)

            rows.append([position, job_condition, job_time, company])
        self.save_to_csv(rows)

    def save_to_csv(self, rows):
        with open('job.csv', 'a') as f:
            writer = csv.writer(f)
            writer.writerows(rows)

if __name__ == '__main__':
    job = JobSearch()
    for page in range(0, 100):
        job.get_detail(str(page))