requests并不是系统自带的模块，他是第三方库，需要安装才能使用

requests库使用方式

闲话少说，来，让我们上代码：
简单的看一下效果：

import requests

requests = requests.session()

headers = {

    'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0'

}

url = "http://httpbin.org"

response = requests.get(url, headers=headers, timeout=None)

print(response.text)

print(response.cookies)

print(response.content)

print(response.content.decode("utf-8"))

print(respone.json())

基本的post请求：

data = {

    "name":"zhaofan",

    "age":23

}

response = requests.post("http://httpbin.org/post",data=data)

print(response.text)

对于无效的网站证书请求方法：

data = {

    "name":"zhaofan",

    "age":23

}

response = requests.post("http://httpbin.org/post",data=data)

print(response.text)

代理设置：

import requests

proxies= {

    "http":"http://127.0.0.1:9999",

    "https":"http://127.0.0.1:8888"

}

response  = requests.get("https://www.baidu.com",proxies=proxies)

print(response.text)

如果代理需要设置账户名和密码,只需要将字典更改为如下：

proxies = {

"http":"http://user:password@127.0.0.1:9999"

}

如果你的代理是通过sokces这种方式则需要pip install "requests[socks]"

proxies= {

"http":"socks5://127.0.0.1:9999",

"https":"sockes5://127.0.0.1:8888"

}

超时设置

通过timeout参数可以设置超时的时间

没有超时时间，一直等待timeout=None

异常捕捉：

import requests

from requests.exceptions import ReadTimeout,ConnectionError,RequestException

try:

    response = requests.get("http://httpbin.org/get",timout=0.1)

    print(response.status_code)

except ReadTimeout:

    print("timeout")

except ConnectionError:

    print("connection Error")

except RequestException:

    print("error")