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python爬虫会话已超时怎么办

百变鹏仔 4天前 #Python
文章标签 爬虫
解决Python爬虫会话超时问题的方案包括:1. 设置明确超时;2. 使用会话对象;3. 捕获超时异常并重试;4. 调整底层协议。

Python爬虫会话超时解决方案

当使用Python爬虫进行网络抓取时,可能会遇到会话超时的问题,这会导致爬虫无法获取所需的页面内容。解决此问题的方法如下:

1. 设置显式超时:

import requestsurl = 'https://example.com'timeout = 5try:    response = requests.get(url, timeout=timeout)except requests.exceptions.Timeout as e:    # 处理超时异常    print(e)

2. 使用会话对象:

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import requestssession = requests.Session()url = 'https://example.com'timeout = 5try:    response = session.get(url, timeout=timeout)except requests.exceptions.Timeout as e:    # 处理超时异常    print(e)

3. 捕获并重试:

import requestsurl = 'https://example.com'timeout = 5retries = 3for i in range(retries):    try:        response = requests.get(url, timeout=timeout)        break  # 捕获页面内容后停止重试    except requests.exceptions.Timeout as e:        # 重试        print(e)

4. 调整底层协议:

import requests_futuressession = requests_futures.FuturesSession()url = 'https://example.com'future = session.get(url)response = future.result(timeout=timeout)