# 爬取人人车车车辆信息。
from urllib.request import urlopen
from urllib.error import HTTPError
import re, sqlite3
class RRCSpider(object):
"""
人人车爬虫类
"""
def __init__(self):
pass
def get_list_html(self, page_num):
"""
获取列表页源代码
:param page_num: 列表页的页码
:return: 返回网页源代码
"""
list_url = 'https://www.renrenche/zz/ershouche/p{}/'.format(page_num)
try:
list_html = urlopen(list_url).read().decode()
except HTTPError as e:
print('列表页异常:url={}, error={}'.format(list_url, e))
return None, None
else:
return list_html, list_url
def parse_list_html(self, list_html, list_url):
"""
解析列表页数据
:param list_html: 列表页网页源代码
:return: 返回每一个数据的详情页地址
"""
# 利用正则表达式提取列表页中所有二手车的详情页的链接。
detail_urls = re.findall(repile(r'<li class="span6 list-item.*?".*?<a.*?href="(.*?)".*?class="thumbnail"', re.S), list_html)
if detail_urls:
return detail_urls
else:
print('列表页数据为空:url={}'.format(list_url))
return None
def get_detail_html(self, detail_url):
"""
获取详情页源代码
:param detail_url: 详情页的url
:return: 返回详情页网页源代码
"""
try:
detail_html = urlopen(detail_url).read().decode()
except HTTPError as e:
print('详情页异常:url={}, error={}'.format(detail_url, e))
return None, None
else:
return detail_html, detail_url
def parse_detail_html(self, detail_html, detail_url):
"""
解析详情页数据
:param detail_html: 详情页网页源代码
:return: None
"""
# [('本天', '6.7', '2010')]
data = re.findall(repile(r'<h1 class="title-name rrc.*?">(.*?)</h1>.*?<p class="price.*?">(.*?)</p>.*?<p class="money.*?首付(.*?)<.*?月供(.*?)</p>.*?<ul class=".*?box-list-primary-detail">.*?<strong class="car-summary rrc.*?">(.*?)</strong>.*?<p class="small-title rrc.*?">(.*?)</p>.*?<strong.*?id="car-licensed">(.*?)</strong>.*?<p>.*?<strong class="car-summary">(.*?)</strong>.*?<p class="transfer-record">.*?<strong.*?>(.*?)</strong>', re.S), detail_html)[0]
print(data)
def start_spider(self, num):
"""
爬虫程序启动入口
:return:
"""
print('正在请求第{}页'.format(num))
list_html, list_url = self.get_list_html(num)
if list_html:
detail_urls = self.parse_list_html(list_html, list_url)
if detail_urls:
for detail_url in detail_urls:
url = 'https://www.renrenche' + detail_url
detail_html, d_url = self.get_detail_html(url)
if detail_html:
self.parse_detail_html(detail_html, d_url)
if __name__ == '__main__':
obj = RRCSpider()
# 这是同步for循环
for x in range(1,2):
obj.start_spider(x)
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【爬虫入门】【正则表达式】【同步】爬取人人车车辆信息1.0
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