1. 先安装requests库，通过 pip install requests 进行安装，也可以通过pycharm的python Interpreter直接搜索安装（详见文章url）

2. 导入requests

import requests

3.目前我整理的常见用法总结，可以使用 http://httpbin.org/ 提供的接口请求来进行练习实践。这是具体的学习视频：Python HTTP 请求发送第三方模块 requests 使用

import requests

# 发送请求
r = requests.get("http://httpbin.org/#/HTTP_Methods/get_get")
print(dir(r))  # 响应对象的属性和方法
print(help(r))  # 获取帮助内容
print(r.url)  # 获取响应URL
print(r.status_code)  # 获取响应状态码
print(r.headers.get("content-type"))  # 获取响应头 Content-Type字段
print(r.json())  # 获取响应JSON
print(r.text)  # 获取响应主体内容
print(r.content)  # 获取二进制响应内容

# 传递参数
payload = {"page": 1, "limit": 20}
r = requests.get("https://httpbin.org/get", payload)
print(r.text)

# 请求主体
payload = {"username": "curder", "password": "test"}
r = requests.post("http://httpbin.org/post", payload)
print(r.text)

# HTTP 身份验证
r = requests.get("https://httpbin.org/basic-auth/ml/dd", auth=("ml", "dd"))
print(r.text)

# 请求超时时间
try:
     r = requests.get("http://httpbin.org/delay/3", timeout=2)
 except requests.exceptions.ReadTimeout:
     print('timeout')
    #  也可以发送邮件或者通知

#  响应状态码的获取
r = requests.get("http://httpbin.org/status/422")
print(r.status_code)
# Cookies
r = requests.get("http://httpbin.org/cookies", cookies={"username": "123"})
print(r.text)

with requests.Session() as session:
     jar = session.cookies
     jar.set('test', 'value', domain="httpbin.org", path="/cookies")
     r = requests.get("http://httpbin.org/cookies", cookies=jar)
     print(r.text)

# 重定向
r = requests.get("http://httpbin.org/redirect_to", params={"url": "https://baidu.com"})
print(r.url, r.status_code, r.history, sep="\n")

# 请求上下文
with requests.Session() as session:
    login_response = session.post('https://testerhome.com/account/sign_in', data={"login": "443", "password": "123"})
    print(login_response.cookies)
    r = session.get("https://testerhome.com/topics/waiting_audit_topics")

print(r.url)