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                `requests`庫提供了一個`session`類,來實現客戶端與服務器的會話保持。 ```python # 實例化一個session對象 session = requests.session() # 讓session發送get或post請求 response = session.get(url, headers) response = session.post(url, headers) ``` <br/> 案例:登錄人人網 ```python import requests post_url = 'http://www.renren.com/PLogin.do' header = { 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.75 Safari/537.36' } # 1. 賬號和密碼 post_data = { 'email': '123456@qq.com', 'password': '123456' } # 2. 獲取session對象 session = requests.session() # 3. 請求成功后,cookie會自動保存在session中 session.post(post_url, data=post_data, headers=header) # 4. 請求登陸之后的頁面 response = session.get('http://www.renren.com/474133869/profile', headers=header) with open('renren.html', 'w', encoding='utf-8') as f: f.write(response.text) ```
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