Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
176 views
in Technique[技术] by (71.8m points)

python - Strict comparison

In javascript, there are strict comparison operators op1 === op2 and op1 !== op2 that will compare both type and value. Is there a pythonic way of achieving the same thing?

So far I've only been able to come up with the following messy conditionals:

isinstance(op1, type(op2)) and isinstance(op2, type(op1)) and op1 == op2

and

not isinstance(op1, type(op2)) or not isinstance(op2, type(op1)) or op1 != op2
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

Your approach would indeed check both value and type. There isn't a different operator in Python.

This having been said, in many cases that's not what you want - in Python's philosophy any object that behaves as a duck should be treated as a duck. You often don't want only dictionaries, you want "mapping-like" objects and so on - as long as the object can be used for the particular task then the code should accept it.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...