分析 url 的时候我们一般都是从第二页开始分析，可以看出 url 的变化
#!/usr/bin/python3
# -*- coding: utf-8 -*-
import requests
class TiebaSpider():
def __init__(self,kw,max_pn):
self.max_pn = max_pn
self.kw = kw
self.base_url = "https://tieba.baidu.com/f?kw={}&ie=utf-8&pn={}"
self.headers = {
"User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36"
}
pass
def get_url_list(self):
'''
获取 url 列表
:return:
'''
# 写法一
'''
url_list = []
for pn in range(0,self.max_pn,50):
url = self.base_url.format(self.kw,pn)
url_list.append(url)
return url_list
'''
# 写法二
return [self.base_url.format(self.kw,pn) for pn in range(0,self.max_pn,50)]
def get_content(self,url):
'''
发送请求获取响应内容
:param url:
:return:
'''
response = requests.get(
url=url,
headers = self.headers
)
return response.content
def get_items(self,content,idx):
'''
从响应内容中提取数据
:param content:
:return:
'''
with open('08-{}.html'.format(idx),'wb') as f:
f.write(content)
return None
def save_items(self,items):
'''
保存数据
:param items:
:return:
'''
pass
def run(self):
# 1. 获取 url 列表
url_list = self.get_url_list()
for url in url_list:
# 2. 发送请求获取响应
content = self.get_content(url)
# 3. 从响应中提取数据
items = self.get_items(content,url_list.index(url) + 1)
# 4. 保存数据
self.save_items(items)
pass
if __name__ == '__main__':
spider = TiebaSpider("英雄联盟",150)
spider.run()
