Xrange and Range in Python

Posted on Edited on Word count in article: 354 Reading time ≈ 1 mins.

简单来说

python range会生成一个list对象，然后返回list中的内容，而xrange不会生成list对象。所以xrange相对与range来说更省空间，并且速度较快。

在英文中的官方解释是：

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class xrange(object)
 |  xrange([start,] stop[, step]) -> xrange object
 |  
 |  Like range(), but instead of returning a list, returns an object that
 |  generates the numbers in the range on demand.  For looping, this is 
 |  slightly faster than range() and more memory efficient.

ok. Do you understand?