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  • range与xrange的区别

    <Category: Python> 查看评论

    python里的range与xrange,都可以进行用来进行迭代处理,但是两者却是不一样的,区别如下:

    for x in (100):会返回1个包含了100个整数的list对象,并进行迭代分别返回给x

    for x in (100):也会返回100个整数,不过没有一次返回一个集合,而是依次返回一个变量,然后赋值给x,所以也只占一个整数变量所需的内存的就行了,相对来说,由于每次都要分配内存,性能也有些影响,所以怎么使用要看情况哦。

    总结,range创建代价大,消耗内存多,xrange占用内存小,每次请求的效率低一些,有点像.NET里的String和StringBuilder了

    本文来自: range与xrange的区别

    
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