Python库urllib与urllib2有哪些差异
发布时间：2021-11-19 17:26:03 所属栏目：教程 来源：互联网
导读：分享下Python库urllib与urllib2用法区别，初学Python的同学常有此困惑，今天一揭谜底。 学习Python，一直不明白urllib和urllib2的区别，以为2是1的升级版。今天看到老外写的一篇《Python: difference between urllib and urllib2》才明白其中的区别 You might
|
分享下Python库urllib与urllib2用法区别，初学Python的同学常有此困惑，今天一揭谜底。 学习Python，一直不明白urllib和urllib2的区别，以为2是1的升级版。今天看到老外写的一篇《Python: difference between urllib and urllib2》才明白其中的区别 You might be intrigued by the existence of two separate URL modules in Python -urllib and urllib2. Even more intriguing: they are not alternatives for each other. So what is the difference between urllib and urllib2, and do we need them both? 你可能对于Python中两个独立存在的-urllib2和-urllib2感到好奇。更有趣的是：它们并不是可以相互代替的。那么这两个模块间的区别是什么，并且这两个我们都需要吗？ urllib and urllib2are both Python modules that do URL request related stuff but offer different functionalities. Their two most significant differences are listed below: urllib 和urllib2都是接受URL请求的相关模块，但是提供了不同的功能。两个最显著的不同如下： •urllib2 can accept a Request object to set the headers for a URL request,urllib accepts only a URL. That means, you cannot masquerade your User Agent string etc. urllib2可以接受一个Request类的实例来设置URL请求的headers，urllib仅可以接受URL。这意味着，你不可以伪装你的User Agent字符串等。 •urllib provides the urlencode method which is used for the generation of GET query strings, urllib2 doesn't have such a function. This is one of the reasons why urllib is often used along with urllib2. urllib提供urlencode方法用来GET查询字符串的产生，而urllib2没有。这是为何urllib常和urllib2一起使用的原因。 For other differences between urllib and urllib2 refer to their documentations, the links are given in the References section. Tip: if you are planning to do HTTP stuff only, check out httplib2, it is much better than httplib or urllib or urllib2. 提示：如果你仅做HTTP相关的，看一下httplib2，比其他几个模块好用。  （编辑：宁德站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
