Requests庫功能相比Urllib庫更強大，也許是自帶的

如果沒有，cmd輸入pip install requests獲取即可

例項：

import requests
response = requests.get("http://www.baidu.com")
print(type(response))
print(response.status_code)
print(type(response.text))
print(response.text)
print(response.cookies)

各種請求方式：

import requests
requests.post("http://httpbin.org/post"
 
)
requests.put("http://httpbin.org/put")
requests.delete("http://httpbin.org/delete")
requests.head("http://httpbin.org/head")
requests.options("http://httpbin.org/options")
requests.get("http://httpbin.org/get")

基本get請求：

import requests
response = requests.get("http://httpbin.org/get")
print(response.text)

帶引數get請求1:

import requests
response = requests.get("http://httpbin.org/get?name=yiqing&age=18")
print(response.text)

帶引數get請求2：

import requests
data = {
    "name": "yiqing",
"age": 18
}
response = requests.get("http://httpbin.org/get", params=data)
print(response.text)

解析JSON：

import requests
response = requests.get("http://httpbin.org/get"
 
)
print(response.json())
print(type(response.json()))

獲取二進位制資料（給出了一個圖片的地址，下載到本地）：

import requests
response = requests.get("http://p1.music.126.net/vvZLXI5EqFLsKLlvfqz0uA==/19088621370291879.jpg")
with open("pic.jpg", "wb") as f:
    f.write(response.content)

新增headers:

import requests
headers = {
    "User-Agent":"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36"
}
response = requests.get("http://www.baidu.com", headers=headers)
print(response.text)

基本post請求：

import requests
data = {
    "name": "yiqing",
"age": 18
}
response = requests.post("http://httpbin.org/post", data=data)
print(response.text)

帶引數post請求：

import requests
data = {
    "name": "yiqing",
"age": 18
}
headers = {
    "User-Agent":"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36"
}
response = requests.post("http://httpbin.org/post", data=data, headers=headers)
print(response.json())

狀態碼判斷:

import requests
response = requests.get("http://www.baidu.com")
exit()if not response.status_code == requests.codes.ok else print("Requests Successfully")

相當於：

import requests
response = requests.get("http://www.baidu.com")
exit()if not response.status_code == 200 else print("Requests Successfully")

檔案上傳（用剛才下載的圖片）：

import requests
files = {"file": open("pic.jpg", "rb")}
response = requests.post("http://httpbin.org/post", files=files)
print(response.text)

獲取cookie:

import requests
response = requests.get("http://blog.csdn.net/")
print(response.cookies)
for key, value in response.cookies.items():
    print(key+"="+value)

嘗試模擬登入:

import requests
requests.get("http://httpbin.org/cookies/set/number/123456789")
response = requests.get("http://www.httpbin.org/cookies")
print(response.text)

發現這樣登入會失敗，這裡兩次用get方式發起請求，實際上這兩次是完全獨立的過程，相當於在兩個沒有關聯的瀏覽器上進行操作的。因此獲取不到任何的cookie資訊。要做到兩次訪問用一個瀏覽器，就是下面的方法：

import requests
s = requests.Session()
s.get("http://httpbin.org/cookies/set/number/123456789")
response = s.get("http://www.httpbin.org/cookies")
print(response.text)

證書驗證：

import requests
response = requests.get("https://www.12306.cn")
print(response.status_code)

發現出現了錯誤，原因是沒有合法證書

這裡可以避免：

import requests
response = requests.get("https://www.12306.cn", verify=False)
print(response.status_code)

不過依然有警告資訊，再這樣操作可以去除警告資訊：

import requests
from requests.packages import urllib3
urllib3.disable_warnings()
response = requests.get("https://www.12306.cn", verify=False)
print(response.status_code)

代理設定：

import requests
proxies = {
    "http": "http://222.222.169.60:53281",
"https": "http://222.222.169.60:53281"
}
response = requests.get("http://www.baidu.com", proxies=proxies)
print(response.status_code)

有密碼的代理：

import requests
proxies = {
    "http": "http://user:[email protected]:53281/",
}
response = requests.get("http://www.baidu.com", proxies=proxies)
print(response.status_code)

超時設定：

import requests
response = requests.get("http://www.baidu.com", timeout=1)
print(response.status_code)

抓住異常：

import requests
from requests.exceptions import ConnectTimeout
try:
    response = requests.get("http://httpbin.org/get", timeout=0.1)
    print(response.status_code)
except ConnectTimeout:
    print("TIMEOUT")