python爬虫基础教程：requests库（二）代码实例

get请求

简单使用

import requests'''想要学习python/' target='_blank'>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

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

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

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

# _*_ 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脚本之家网站的支持！