python urllib2和urllib的区别
2013-05-10 18:54
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作为一个Python菜鸟,之前一直懵懂于urllib和urllib2,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。
[align=justify][/align]
You might
be intrigued by the existence of two separate URL modules in Python -
and
alternatives for each other. So what is the difference between
and
[align=justify][/align]
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?
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:
can accept a
object to set the headers for a URL request,
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。
[align=justify][/align]
provides the
method which is used for the generation of GET query strings,
doesn't have such a function. This is one of the reasons why
is often used along with
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。
[align=justify][/align]
[align=justify][/align]
For other differences between
and
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.
[align=justify][/align]
提示:如果你仅做HTTP相关的,看一下httplib2,比其他几个模块好用。
difference between urllib and urllib2》才明白其中的区别。
[align=justify][/align]
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?
[align=justify][/align]
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。
[align=justify][/align]
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。
[align=justify][/align]
[align=justify][/align]
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.
[align=justify][/align]
提示:如果你仅做HTTP相关的,看一下httplib2,比其他几个模块好用。
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