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983天前## ********************************** 第一步：抓取该平台二手车的所有品牌 ********************************** |
# 导入第三方包 |
import requests |
from bs4 import BeautifulSoup |
import time |
# 设置伪头 |
headers = { |
'Accept':'*/*', |
'Accept-Encoding':'gzip, deflate, br', |
'Accept-Language':'zh-CN,zh;q=0.9', |
'Connection':'keep-alive', |
'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.81 Safari/537.36 SE 2.X MetaSr 1.0' |
} |
# 二手车主页的链接 |
url = 'https://changsha.taoche.com/all/' |
# 发出抓取链接的请求并进一步解析 |
res = requests.get(url, headers = headers).text |
soup = BeautifulSoup(res,'html.parser') |
# 抓取二手车品牌名称及对应的链接 |
car_brands = soup.find('div',{'class':'li_main clearfix'}).find_all('li') |
car_brands = [j for i in car_brands for j in i] |
car_brands = car_brands[41:] |
brands = [i for i in car_brands] |
brands = [i.text for i in car_brands] |
urls = ['https://changsha.taoche.com' + i['href'] for i in car_brands] |
print(urls) |
## ********************************** 第二步：抓取该平台二手车的目标链接 ********************************** |
# 生成所需抓取的目标链接 |
target_urls = [] |
target_brands = [] |
for b,u in zip(brands,urls): |
# 抓取各品牌二手车主页下的所有页码 |
|
res = requests.get(u, headers = headers).text |
soup = BeautifulSoup(res,'html.parser') |
# 查询出页数 |
if len(soup.findAll('div',{'class':'paging-box the-pages'})) == 0: |
pages = 1 |
else: |
pages = int([page.text for page in soup.findAll('div',{'class':'paging-box the-pages'})[0].findAll('a')][-2]) |
time.sleep(0) |
|
#问题段落。 |
uu = u |
page_num = pages |
print(page_num) |
for i in range(1,page_num): |
target_brands.append(b) |
print(target_brands) |
try: |
target_urls.append(u+'?page='+str(i)+'#pagetag') |
print(u) |
infos=soup.find('ul',{'class':'gongge_ul'}).find_all('li') |
except AttributeError: |
print('当前页空白') |
print(target_urls) |
## ********************************** 第三步：对该平台的二手车信息进行采集 ********************************** |
# 构建空列表，用于数据的存储 |
brand = [] |
title = [] |
boarding_time = [] |
km = [] |
discharge = [] |
sec_price = [] |
new_price = [] |
# 对每个链接发生请求 |
for b,u in zip(target_brands,target_urls): |
res = requests.get(u, headers = headers).text |
soup = BeautifulSoup(res,'html.parser') |
# 每页车子的数量 |
N = len([i.findAll('a')[0]['title'] for i in soup.findAll('div',{'class':'gongge_main'})]) |
print(N) |
try: |
# 车品牌 |
brands = (b+'-')*N |
brand.extend(brands.split('-')[:-1]) |
# 车名称 |
title.extend([i.findAll('a')[0]['title'] for i in soup.findAll('div',{'class':'gongge_main'})]) |
# 二手车的上牌时间、行驶里程数等信息 |
info = [i.findAll('li') for i in soup.findAll('ul',{'class':'gongge_ul'})] |
boarding_time.extend([i[0].text[4:] for i in info]) |
km.extend([i[1].text[4:] for i in info]) |
discharge.extend([i[3].text[4:] for i in info]) |
sec_price.extend([float(i.findAll('h2')[0].text[:-1]) for i in soup.findAll('div',{'class':'gongge_main'})]) |
new_price.extend([i.findAll('p')[0].text.split('\xa0')[0][5:].strip() for i in soup.findAll('div',{'class':'gongge_main'})]) |
except IndexError: |
pass |
# 每3秒停顿一次 |
time.sleep(0) |
|
## ********************************** 第四步：将采集来的数据进行存储 ********************************** |
# 数据导出 |
import pandas as pd |
cars_info = pd.DataFrame([brand,title,boarding_time,km,discharge,sec_price,new_price]).T |
cars_info = cars_info.rename(columns={0:'Brand',1:'Name',2:'Boarding_time',3:'Km',4:'Discharge',5:'Sec_price',6:'New_price'}) |
cars_info.to_csv('second_cars_info.csv', index=False) |
