python爬虫入门代码
python爬虫基础教程：requests库二代码实例get请求
简单使用
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import requests'''想要学习python？python学习交流群：973783996满足你的需求，资料都已经上传群文件，可以自行下载！'''response = requests.get("https://www.baidu.com/")#text返回的是unicode的字符串，可能会出现乱码情况# print(response.text) #content返回的是字节，需要解码print(response.content.decode('utf-8')) # print(response.url) #https://www.baidu.com/# print(response.status_code) #200# print(response.encoding) #iso-8859-1 |
添加headers和params
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import requests params = { 'wd':'python'}headers = { 'user-agent':'mozilla/5.0 (windows nt 6.1; win64; x64) applewebkit/537.36 (khtml, like gecko) chrome/64.0.3282.140 safari/537.36'} response = requests.get("https://www.baidu.com/s",params=params,headers=headers) #content返回的是字节，需要解码with open('baidu.html','w',encoding='utf-8') as f: f.write(response.content.decode('utf-8')) |
post请求
爬去拉钩网职位信息
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import requests url = "https://www.lagou.com/jobs/positionajax.json?city=%e5%8c%97%e4%ba%ac&needaddtionalresult=false" data = { 'first':'true', 'pn':1, 'kd':'python'} headers = { "user-agent":"mozilla/5.0 (windows nt 6.1; win64; x64) applewebkit/537.36 (khtml, like gecko) chrome/64.0.3282.140 safari/537.36", "referer":"https://www.lagou.com/jobs/list_python?city=%e5%8c%97%e4%ba%ac&cl=false&fromsearch=true&labelwords=&suginput="} response = requests.post(url,data=data,headers=headers)# print(response.text)print(type(response.text)) #<class 'str'>print(type(response.json())) #<class 'dict'> print(response.json()) #获取为字典的形式 |
使用代理
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import requests proxy = {'http':'115.210.31.236.55:9000'} response = requests.get("https://www.baidu.com/",proxies=proxy) print(response.content.decode('utf-8')) |
session登录
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# _*_ coding:utf-8 _*_ import requests # 1. 创建session对象，可以保存cookie值ssion = requests.session() # 2. 处理 headersheaders = {'user-agent':'mozilla/5.0 (windows nt 6.1; win64; x64) applewebkit/537.36 (khtml, like gecko) chrome/60.0.3112.101 safari/537.36'} # 3. 需要登录的用户名和密码data = {"email":"158xxxxxxxx", "password":"pythonxxxxxxx"} # 4. 发送附带用户名和密码的请求，并获取登录后的cookie值，保存在ssion里ssion.post("http://www.renren.com/plogin.do", data = data) # 5. ssion包含用户登录后的cookie值，可以直接访问那些登录后才可以访问的页面response = ssion.get("http://zhibo.renren.com/news/108") # 6. 打印响应内容print(response.text) |
以上所述是小编给大家介绍的python爬虫基础教程：requests库（二）详解整合，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对开心学习网网站的支持！
原文链接：https://blog.csdn.net/fei347795790/article/details/89153257