如何使用非默认用户代理下载网页urllib2.urlopen?
urllib2.urlopen is not available in Python 3.x /q/2792650; the 3.x equivalent is urllib.request.urlopen. See Changing User Agent in Python 3 for urrlib.request.urlopen https://stackoverflow.com/questions/24226781 to set the user agent in 3.x with the standard library HTTP facilities.
I answered https://stackoverflow.com/a/762007/3790126 a 类似的问题 https://stackoverflow.com/questions/761978/send-headers-along-in-python几周前。
该问题中有示例代码，但基本上您可以执行以下操作：（注意大小写User-Agent as of RFC 2616 https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html，第 14.43 节。）
opener = urllib2.build_opener()
opener.addheaders = [('User-Agent', 'Mozilla/5.0')]
response = opener.open('http://www.stackoverflow.com')
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