Python内置函数(28)——hash

英文文档:

hash(object)Return the hash value of the object (if it has one). Hash values are integers. They are used to quickly compare dictionary keys during a dictionary lookup. Numeric values that compare equal have the same hash value (even if they are of different types, as is the case for 1 and 1.0).

 

说明:  

  1. 返回对象的哈希值,用整数表示。哈希值在字典查找时,可用于快速比较键的值。

>>> hash('good good study')
1032709256

  2. 相等的数值,即使类型不一致,计算的哈希值是一样的。

>>> 1.0 == 1
True
>>> hash(1.0)
1
>>> hash(1)
1
>>> hash(1.0000)
1

 

posted @ 2016-10-29 10:35  十月狐狸  阅读(15591)  评论(0编辑  收藏  举报