Python None comparison: should I use “is” or ==?

标签：should   iso   stack   bsp   nbsp   http   var   ack   object   

Use is when you want to check against an object‘s identity (e.g. checking to see if var is None). Use == when you want to check equality (e.g. Is var equal to 3?).

ref: http://stackoverflow.com/questions/14247373/python-none-comparison-should-i-use-is-or

Python None comparison: should I use “is” or ==?

标签：should   iso   stack   bsp   nbsp   http   var   ack   object   

原文地址：http://www.cnblogs.com/pinganzi/p/6225431.html